Pulse testing device for electromagnet

Abstract

The invention discloses a pulse testing device for an electromagnet, and the device comprises an oil inlet plate which is internally provided with a three-way oil channel; the oil inlet joint is mounted on the oil inlet plate; an oil duct in the oil inlet joint is communicated with a first end of the three-way oil duct; the rail pressure sensor is mounted on the oil inlet plate; an oil duct in the rail pressure sensor is communicated with a second end in the three-way oil duct; an electromagnet; the electromagnetic valve further comprises a sealing base plate, the electromagnet is installed on the electromagnetic valve installation face in the oil inlet plate through a fastener and presses the sealing base plate on the electromagnetic valve installation face in the oil inlet plate, an oil cavity is formed in the sealing base plate, and the oil cavity is communicated with the third end in the three-way oil way. The liquid medium can carry out pulse testing on the electromagnet in the oil cavity through different pressures. The device is simple and compact in structure, the strength of the electromagnet can be tested according to different rail pressure pulses, a more impact-resistant electromagnetic material is selected to meet the reliability requirement according to the pulse test result, and a scientific basis is provided for fuel system electromagnet material selection.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnet testing, and in particular to a device for electromagnet pulse testing. Background Art

[0002] Chinese utility model patent authorization announcement number CN201289411Y discloses a solenoid valve electromagnet suction characteristic test device, including an electromagnet test frame and a test mechanism arranged on the electromagnet test frame; the electromagnet test frame is provided with a side support at the rear end, and a front plate and a rear plate are respectively provided at the front and rear ends of the test mechanism, and the lower end of the rear plate of the test mechanism is connected to the side support through a rotatable device, and a handwheel and a transmission screw are also provided on the rear plate of the test mechanism. A movable plate is also provided in the middle of the test structure, and a nut is provided between the movable plate and the rear plate. The transmission screw is driven by rotating the handwheel to push the nut and the movable plate to move axially in the test mechanism.

[0003] The pulse solenoid valve is a key actuator in the diesel engine electronic fuel injection system. The solenoid valve is composed of silicon steel sheets, coils, connectors, plastic seals and sleeves. Its technical requirements are that when the solenoid valve is connected to a 6.5 ampere constant current source, the valve body end face and the armature in contact with it have a gap of 0.41 mm, and the corresponding magnetic attraction force is 73.8±3.6N.

[0004] There are many methods for testing magnetic attraction, such as static weighing, tension test and weight weighing, but they all have defects such as poor repeatability and low operating efficiency, and are not suitable for mass production of solenoid valves.

[0005] To this end, China Utility Model Patent Authorization Announcement No. CN201810442U discloses a pulse solenoid valve magnetic attraction test device, which includes a mounting plate, a positioning pin, an armature, a tension sensor, a rigid connection plate and a digital conversion display. The armature is fixed on the rigid connection plate and connected to the tension sensor; the tension sensor is fixed to the base of the test device through the connection plate; the mounting plate is connected to the base through a clamp body; the positioning pin is fixed to the mounting plate, the pulse solenoid valve to be tested is placed on the mounting plate and fixed on the positioning pin, and the spacing between the plane of the mounting plate and the armature is 0.41±0.0025mm; the tension sensor is connected to the digital conversion display; after the pulse solenoid valve to be tested is energized, the induced magnetic field generated by the valve body generates a magnetic attraction on the armature and acts on the tension sensor, and the tension sensor converts the magnetic attraction into an electrical signal, which is converted into a digital signal through the digital conversion display and output for display. The utility model can quickly perform magnetic force testing, is easy to operate and has reliable stability, and is suitable for mass production of products.

[0006] However, the structure of the pulse solenoid valve magnetic attraction test device is not compact enough, and there is a slight leakage of the high-pressure oil. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide an electromagnet pulse testing device with a compact structure and no micro-leakage of high-pressure oil in view of the deficiencies in the prior art, thereby providing a scientific basis for the selection of electromagnet materials for the fuel system.

[0008] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0009] A device for testing an electromagnet pulse, comprising:

[0010] an oil inlet plate, in which a three-way oil passage is arranged;

[0011] An oil inlet joint installed on the oil inlet plate, the oil passage in the oil inlet joint being connected to the first end of the three-way oil passage;

[0012] a rail pressure sensor mounted on the oil inlet plate, wherein the oil passage in the rail pressure sensor is connected to the second end of the three-way oil passage;

[0013] An electromagnet; characterized in that,

[0014] It also includes a sealing plate, the electromagnet is mounted on the solenoid valve mounting surface in the oil inlet plate by fasteners and the sealing plate is pressed against the solenoid valve mounting surface in the oil inlet plate, an oil chamber is provided in the sealing plate, the oil chamber is connected to the third end in the three-way oil passage, and the liquid medium can perform pulse testing on the electromagnet in the oil chamber through different pressures.

[0015] In a preferred embodiment of the present invention, the first end and the third end of the three-way oil passage are coaxially arranged, and the second end is perpendicular to the first end and the third end.

[0016] In a preferred embodiment of the present invention, a first sealing ring is provided between the inner end surface of the oil inlet joint and the first end of the three-way oil passage, and a second sealing ring is provided between the inner end surface of the rail pressure sensor and the second end of the three-way oil passage.

[0017] In a preferred embodiment of the present invention, the sealing plate has an upper mounting surface and a lower mounting surface, wherein the electromagnet has a sealing plate contact surface, the upper mounting surface is press-fitted into contact with the solenoid valve mounting surface in the oil inlet plate, and the lower mounting surface is press-fitted into contact with the sealing plate contact surface in the electromagnet.

[0018] In a preferred embodiment of the present invention, the solenoid valve mounting surface in the oil inlet plate, the upper mounting surface, the lower mounting surface, and the sealing pad contact surface in the electromagnet are all high-precision planes.

[0019] In a preferred embodiment of the present invention, a first sealing ring is arranged between the solenoid valve mounting surface in the oil inlet plate and the upper mounting surface; a second sealing ring is arranged between the sealing pad contact surface of the electromagnet and the lower mounting surface to prevent leakage of liquid medium during the test process.

[0020] The sealing pad of the present invention has a sealing ring on both sides (used to prevent micro-leakage of high-pressure oil), thereby forming an electromagnet pulse test device. The electromagnet pulse test device of the present invention has a compact structure, can test the strength of the electromagnet according to different rail pressure pulses, and select more impact-resistant electromagnetic materials to meet reliability requirements according to the pulse test results, providing a scientific basis for the selection of electromagnet materials in the fuel system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the electromagnet pulse testing device of the present invention.

[0022] Figure 2 It is a front view and a cross-sectional view of the electromagnet pulse testing device of the present invention. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.

[0024] See also Figure 1 to Figure 2 The figure shows an electromagnet pulse test device, including an oil inlet plate 1, an oil inlet joint 2, a rail pressure sensor 3, a sealing pad 4, a sealing ring 5a (the aforementioned first sealing ring), a sealing ring 5b (the aforementioned second sealing ring), an electromagnet 6, and a long screw 7.

[0025] A three-way oil passage is arranged in the oil inlet plate 1; the three-way oil passage has a first end 1a, a second end 1b, and a third end 1c, the first end 1a and the third end 1c of the three-way oil passage are arranged coaxially, and the second end 1b is perpendicular to the first end 1a and the third end 1c. The oil inlet joint 2 and the rail pressure sensor 3 are directly assembled on the oil inlet plate 1 through threaded connection, the oil passage 2a in the oil inlet joint 2 is connected with the first end 1a of the three-way oil passage, and the oil passage 3a in the rail pressure sensor 3 is connected with the second end 1b of the three-way oil passage. In addition, a sealing ring band A (the aforementioned first sealing ring band) is arranged between the inner end face of the oil inlet joint 2 and the first end 1a of the three-way oil passage, and a sealing ring band B (the aforementioned second sealing ring band) is arranged between the inner end face of the rail pressure sensor 3 and the second end 1b of the three-way oil passage, so that the oil inlet joint 2 and the rail pressure sensor 3 are respectively plane-sealed by the sealing ring band A and the sealing ring band B, which can effectively prevent the leakage of the liquid medium during the test process.

[0026] The electromagnet 5 and the sealing plate 6 are fixed to the solenoid valve mounting surface 1d of the oil inlet plate 1 by a plurality of long screws 7. The sealing plate 4 has an upper mounting surface 4a and a lower mounting surface 4b. The electromagnet 6 has a sealing plate contact surface 6a. The solenoid valve mounting surface 1d, the upper mounting surface 4a, the lower mounting surface 4b in the oil inlet plate 1, and the sealing plate contact surface 6a in the electromagnet 6 are all high-precision planes with high flatness and high surface rough machining.

[0027] The upper mounting surface 4a is press-fitted into contact with the solenoid valve mounting surface 1d in the oil inlet plate 1, and the lower mounting surface 4b is press-fitted into contact with the sealing pad contact surface 6a in the electromagnet 6, so that high-pressure sealing can be effectively performed.

[0028] The sealing pad 4 has an oil chamber E in it, and the oil chamber E is connected to the third end 1c of the three-way oil passage. The liquid medium can perform pulse testing on the electromagnet in the oil chamber through different pressures.

[0029] In addition, a sealing ring 5a (the aforementioned first sealing ring) is arranged between the solenoid valve mounting surface 1d and the upper mounting surface 4a in the oil inlet plate 1; a sealing ring 5b (the aforementioned second sealing ring) is arranged between the sealing pad contact surface 5a of the electromagnet 5 and the lower mounting surface 4b to further prevent leakage of the liquid medium in the oil chamber E during the test.

[0030] The working principle of the present invention is as follows: the pressure test liquid medium enters the first end 1a cavity of the three-way oil passage of the oil inlet plate 1 through the oil passage 2a of the oil inlet joint 2, and the oil passage 3a in the rail pressure sensor 3 senses the medium pressure transmitted by the medium through the second end 1b in the three-way oil passage for monitoring and adjustment.

[0031] The pressure test liquid medium enters the oil chamber E through the oil passage 2a of the oil inlet joint 2 and the first end 1a and the third end 1c of the three-way oil passage. The oil passage 2a of the oil inlet joint 2, the first end 1a, the second end 1b, the third end 1c of the three-way oil passage, and the oil chamber E are connected to each other, and the pressure transmission is the same. The liquid medium can perform several pulse tests on the electromagnet in the oil chamber E at different pressures, thereby verifying the pressure resistance and durability of the electromagnet material.

[0032] The electromagnet pulse test device described in the present invention has a simple and compact structure, and can test the strength of the electromagnet according to different rail pressure pulses. According to the pulse test results, a more impact-resistant electromagnetic material can be selected to meet the reliability requirements, providing a scientific basis for selecting electromagnet materials for the fuel system.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the structural principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for testing an electromagnet pulse, comprising: an oil inlet plate, in which a three-way oil passage is arranged; An oil inlet joint installed on the oil inlet plate, the oil passage in the oil inlet joint being connected to the first end of the three-way oil passage; a rail pressure sensor mounted on the oil inlet plate, wherein the oil passage in the rail pressure sensor is connected to the second end of the three-way oil passage; An electromagnet; characterized in that, It also includes a sealing plate, the electromagnet is mounted on the solenoid valve mounting surface in the oil inlet plate by fasteners and the sealing plate is pressed against the solenoid valve mounting surface in the oil inlet plate, an oil chamber is provided in the sealing plate, the oil chamber is connected to the third end in the three-way oil passage, and the liquid medium can perform pulse testing on the electromagnet in the oil chamber through different pressures.

2. The electromagnet pulse test device according to claim 1, characterized in that: The first end of the three-way oil passage is coaxially arranged with the third end, and the second end is perpendicular to the first end and the third end.

3. The electromagnet pulse test device according to claim 1, characterized in that: A first sealing ring is provided between the inner end surface of the oil inlet joint and the first end of the three-way oil passage, and a second sealing ring is provided between the inner end surface of the rail pressure sensor and the second end of the three-way oil passage.

4. The electromagnet pulse testing device according to claim 1, characterized in that: The sealing plate has an upper mounting surface and a lower mounting surface, wherein the electromagnet has a sealing plate contact surface, the upper mounting surface is press-fitted into contact with the solenoid valve mounting surface in the oil inlet plate, and the lower mounting surface is press-fitted into contact with the sealing plate contact surface in the electromagnet.

5. The electromagnet pulse test device according to claim 4, characterized in that: The solenoid valve mounting surface in the oil inlet plate, the upper mounting surface, the lower mounting surface, and the sealing pad contact surface in the electromagnet are all high-precision planes.

6. The electromagnet pulse test device according to claim 5, characterized in that: A first sealing ring is arranged between the electromagnetic valve mounting surface in the oil inlet plate and the upper mounting surface; a second sealing ring is arranged between the sealing pad contact surface of the electromagnet and the lower mounting surface to prevent leakage of liquid medium during the test process.

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