CN204344342U - A kind of fuel injection pump tester - Google Patents

Abstract

A kind of fuel injection pump tester, comprise frame, be arranged on the Injection Pump power transmission system in frame, frame is connected with mist of oil absorbing mechanism, mist of oil absorbing mechanism comprises oil mist collector and mist of oil absorbing cover, device for testing amount of fuel delivered is provided with below mist of oil absorbing cover, described device for testing amount of fuel delivered comprises fuel injection quantity test support body, be located at the catchment cup on fuel injection quantity test support body, be located at oil jug below catchment cup and be located at the weighing sensor be connected bottom oil jug and with oil jug, the retarder that fuel injection quantity test support body is provided with stepper motor and is in transmission connection with stepper motor, fuel injection quantity test support body is provided with the switching mechanism tested support body bearing with fuel injection quantity and be connected, switching mechanism is connected with the output shaft of retarder by coupling, weighing sensor is connected on switching mechanism, and described catchment cup has oil outlet, and oil outlet is positioned at directly over oil jug rim of a cup.The utility model Absorbable organic halogens, test the fuel injection quantity of Injection Pump accurately and rapidly.

Description

A fuel injection pump test bench

technical field

The utility model relates to testing equipment for testing the performance of a fuel injection pump of a diesel engine, in particular to a test bench for a fuel injection pump.

Background technique

Existing diesel fuel injection pump fuel injection test equipment usually adopts the volumetric measurement method, that is, collects the fuel injection of the fuel injection pump within a certain counting time through a measuring cup, and then reads the scale of the measuring cup to judge the fuel injection pump's fuel injection volume. After each test is completed, the diesel in the measuring cup needs to be released. Due to the high viscosity of diesel oil, it takes a long time to discharge by self-flow, resulting in a long interval between two tests. In addition, the dirty diesel discharge in the measuring cup will affect the accuracy of the next measurement.

In order to solve the above problems, Chinese Patent Application No. 200720017022.4 patent discloses a fuel injection pump fuel injection test device, the device includes a box with a door, in the box there are a plurality of oil measuring cups installed on the swing frame, in the There is an oil collecting cup with a standard fuel injector on the top of each oil measuring cup. There is an oil cut-off plate between the oil measuring cup and the oil collecting cup to connect with the shifting mechanism. The oil receiving groove on the rear wall, in addition, there is a single-chip microcomputer corresponding to each oil measuring cup in the swing frame. There is a pressure plate fixed on the bottom of the oil measuring cup between each oil measuring cup and the pendulum described in this scheme, and the pressure plate is connected with the load cell installed in the sensor case; and the pendulum is fixedly connected with the pendulum, The rod is in turn connected to the swing mechanism. The swing mechanism is connected with the swing cylinder by the electric control air valve through the air guide pipe, and the outlet shaft of the swing cylinder is connected with the swing rod. There is also a positioning mechanism on the swing frame, which is a Hall switch fixed on the swing frame and a corresponding positioning magnet fixed on the side wall of the box body. This scheme adopts weighing measurement method, and utilizes single-chip microcomputer to realize automatic control. After the oil in the oil measuring cup is poured out during the test process, the weight of the oil measuring cup can be reset to zero, so you don’t have to worry about whether there is any oil left in the oil measuring cup. If there is remaining oil, the test of the next fuel injection quantity can be carried out, thereby shortening the test time. However, because the swing mechanism is connected to the swing cylinder by the electric control air valve through the air guide tube, the output shaft of the swing cylinder is connected to the swing rod to realize the oil in the oil measuring cup is poured out, and the impact on the weighing system is easily caused by this pneumatic method In addition, the fuel injection part of the mechanism is connected with the weighing part, which affects the accuracy of the weighing sensor, not only affects the accuracy of its measurement, but also easily causes damage to the weighing sensor; at the same time, the device requires an air supply source and can only be used In the case of an air source, its application is limited. In addition, the oil mist produced during the high-pressure injection process of the fuel injection pump injector will pollute the environment and cause harm to the human body.

Utility model content

The utility model provides a fuel injection pump test bench, which can test the fuel injection quantity of the fuel injection pump more stably and accurately.

The technical scheme of the utility model is: a fuel injection pump test bench, including a frame, a fuel injection pump power transmission system arranged on the frame, an oil circuit supply system, an electrical control system and an operation display system. The mist absorbing mechanism, the oil mist absorbing mechanism includes an oil mist collector and an oil mist absorbing cover, and a fuel injection quantity test device is arranged under the oil mist absorb The oil collection cup on the oil quantity test frame body, the oil measuring cup arranged under the oil collecting cup and the weighing sensor which is arranged at the bottom of the oil measuring cup and connected with the oil measuring cup, and the fuel injection quantity testing frame body is provided with a stepper The motor and the reducer connected to the stepping motor drive, the fuel injection quantity test frame body is provided with a turning mechanism connected with the fuel injection quantity test frame bearing, and the turning mechanism is connected with the output shaft of the reducer through a coupling; weighing The sensor is connected to the turning mechanism, and the oil collecting cup has an oil outlet, and the oil outlet is located directly above the mouth of the oil measuring cup.

The oil mist absorbing mechanism is provided with a swing arm, and the oil mist absorbing mechanism is hinged to the frame through the swing arm; the bottom of the fuel injection test frame is provided with rollers.

The utility model is provided with an oil cut-off plate and a plate-moving mechanism for driving the oil cut-off plate between the oil measuring cup and the oil collecting cup, and an oil receiving groove is arranged on the fuel injection test frame body, and the oil connecting groove is located below the oil outlet of the oil breaking plate .

Because the utility model adopts the above-mentioned structure, the fuel injection quantity of the fuel injection pump can be accurately tested by the weighing sensor, and the fuel injection can be quickly and stably poured through the stepping motor, the reducer and the turning mechanism, and the fuel injection quantity of the fuel injection pump can be tested stably and accurately.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a structural schematic diagram of the fuel injection quantity testing device of the present invention.

FIG. 4 is a top view of FIG. 3 .

Detailed ways

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

As shown in Figures 1-4, the utility model includes a frame 1, a fuel injection pump power transmission system 3 arranged on the frame 1, an oil circuit supply system 15, an electrical control system 2 and an operation display system 13, and the frame 1 is connected to There is an oil mist absorbing mechanism 8. The oil mist absorbing mechanism 8 is composed of an oil mist collector, an oil mist absorbing cover, and connecting pipelines. An oil injection volume testing device 11 is provided under the oil mist absorbing cover. The fuel injection volume testing device 11 includes the fuel injection quantity test frame body 14, the oil collection cup 9 that is located on the fuel injection quantity test frame body 14, the oil measuring cup 10 that is located at the bottom of the oil collection cup 9 and is located at the bottom of the oil measuring cup 10 and is connected with the oil measuring cup. A load cell 19 connected to the cup 10, a stepper motor 16 and a reducer 17 connected to the stepper motor 16 are provided on the fuel injection quantity test frame body 14, and a fuel injection quantity test frame body 14 is provided with a fuel injection quantity test frame body 14. The test frame body 14 is connected to the turning mechanism 22 through the bearing 21, and the turning mechanism 22 is connected to the output shaft of the reducer 17 through the coupling 18; the load cell 19 is connected to the turning mechanism 22, and the oil collecting cup 9 has an oil discharge The oil outlet is located directly above the 10-cup opening of the oil measuring cup.

The oil mist absorbing mechanism 8 is provided with a swing arm 7, and the oil mist absorbing mechanism 8 is hinged to the support 6 on the frame 1 through the swing arm 7; a roller 23 is provided at the bottom of the fuel injection quantity test frame body 14.

The utility model is provided with an oil cut-off plate 20 and a plate-moving mechanism for driving the oil cut-off plate between the oil measuring cup 10 and the oil collecting cup 9, and an oil receiving groove is arranged on the fuel injection amount test frame body 14, and the oil receiving groove is located on the oil breaking plate 20 below the oil outlet.

The working principle and process of the utility model are: the power transmission system 3 of the fuel injection pump drives the fuel injection pump 12 to rotate, and the fuel is sprayed outward through the oil supply system 15 high-pressure oil pipe and the fuel injector, and the oil flows through the oil collecting cup 9 and enters the oil cut-off plate 20 After the measurement starts, the oil breaker 20 is disconnected, the oil flows into the oil measuring cup 10, and the weighing sensor 19 starts to measure. The system is controlled by ECU (Electronic Control Unit) 5 and industrial computer 4.

The fuel injection mechanism of the fuel injection pump test bench of the utility model is completely isolated from the weighing mechanism, which eliminates the influence of vibration on the weighing accuracy when the test bench is working, thereby greatly improving the detection accuracy of the oil quantity. In addition, the fuel injection pump test bench is designed with a special oil mist collection device, which improves the operating environment for workers.

The specific implementation of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned implementation. Various changes are made.

Claims (3)

1. A fuel injection pump test bench, comprising a frame, a fuel injection pump power transmission system arranged on the frame, an oil circuit supply system, an electrical control system and an operation display system, characterized in that: the frame is connected with an oil mist absorber Mechanism, the oil mist absorption mechanism includes an oil mist collector and an oil mist absorption cover, and a fuel injection volume testing device is installed under the oil mist absorption cover. The oil collecting cup on the test frame body, the oil measuring cup arranged under the oil collecting cup and the weighing sensor arranged at the bottom of the oil measuring cup and connected with the oil measuring cup, the fuel injection amount testing frame body is provided with a stepper motor and The reducer connected with the stepping motor transmission, the fuel injection quantity test frame body is provided with a turning mechanism connected with the fuel injection quantity test frame bearing, the turning mechanism is connected with the output shaft of the reducer through a coupling; the load cell is connected On the turning mechanism, the oil collecting cup has an oil outlet, and the oil outlet is located directly above the mouth of the oil measuring cup. 2. The fuel injection pump test bench according to claim 1, characterized in that: the oil mist absorbing mechanism is provided with a swing arm, and the oil mist absorbing mechanism is hinged to the frame through the swing arm; There are active scroll wheels. 3. The fuel injection pump test bench according to claim 1 or 2, characterized in that: an oil cut-off plate and a plate-moving mechanism for driving the oil cut-off plate are arranged between the oil measuring cup and the oil collecting cup, and the fuel injection quantity test stand There is an oil receiving groove on the body, and the oil receiving groove is located below the oil outlet of the oil cut-off plate.