Fatigue testing device for high-pressure oil inlet valve matching parts

Abstract

The invention relates to the technical field of high-pressure common rail fuel pumps of diesel engines, and discloses a fatigue test device for high-pressure oil inlet valve matching parts, a detection tool assembly is mounted in a frame, and the detection tool assembly is used for fatigue detection of the high-pressure oil inlet valve matching parts; the matching part installation assembly is installed on the detection tool assembly and used for fixing a high-pressure oil inlet valve matching part. The control system assembly is arranged in the box body of the frame; one end of the detection pressure head penetrates through the interior of the insertion hole in the locking nut, so that fatigue detection can be carried out on the high-pressure oil inlet valve matching part; in the detection process, the force sensor feeds back a real-time value of force, the real-time value is transmitted to the industrial personal computer through the signal acquisition card, an output signal of the servo electric cylinder controller is adjusted in a closed-loop mode according to a program set in the industrial personal computer, and then a push rod of the servo electric cylinder drives the detection tool assembly to move up and down in a reciprocating mode according to a certain frequency and a certain force. Therefore, the constant-frequency and constant-force value fatigue test of the high-pressure oil inlet valve matching part is realized.

Description

Technical Field

[0001] The invention relates to the technical field of a diesel engine high pressure common rail fuel pump, in particular to a fatigue testing device for a high pressure fuel inlet valve pair. Background Art

[0002] The common rail oil pump is an important component of the high-pressure common rail fuel injection system. The performance requirements of the common rail oil pump have relatively precise requirements in the system, including its oil discharge flow and the pressure range that can be established. The high-pressure inlet valve pair plays an important role in the high-pressure common rail oil pump. It is mainly composed of a pair of valve body and a pair of valve core. The valve type and the valve body form a high-pressure sealing line through the cone surface. The efficient sealing can ensure the normal establishment of pressure in the common rail system and provide a stable oil supply. Therefore, it is particularly important to ensure its reliability and flexibility. It is of great significance to study its fatigue properties. The relevant devices for its testing also play an important role in specific applications.

[0003] Traditionally, the fatigue life of metal materials is usually tested on a tensile machine under axial reciprocating tensile fatigue. Since the actual use of components is varied, simulating the actual use of the product in the test to perform fatigue testing on the components will make the fatigue testing of product components more accurate. For this reason, a fatigue testing device for high-pressure oil inlet valve pairs is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a fatigue testing device for a high-pressure oil inlet valve pair to solve the problem raised in the above background technology that since the conditions of components in actual use are various, simulating the actual use conditions of the product in the test to conduct fatigue testing on the components will make the fatigue testing of product components more accurate.

[0005] To achieve the above object, the present invention provides the following technical solution: a fatigue testing device for high-pressure oil inlet valve components, comprising: frame; A detection tooling assembly, the detection tooling assembly is installed inside the frame, and the detection tooling assembly is used for fatigue detection of high-pressure oil inlet valve pairs; A mating component installation assembly, the mating component installation assembly is installed on the detection tooling assembly, and the mating component installation assembly is used to fix the high-pressure oil inlet valve mating component; Servo electric cylinder; the servo electric cylinder is installed on the top of the detection tooling component, and the servo electric cylinder is used to assist in the detection of the detection tooling component; A control system component is arranged inside a box of the frame, and is used to implement a constant frequency and constant force value fatigue test on a high-pressure oil inlet valve pair.

[0006] Preferably, the above-mentioned detection tooling assembly includes a mounting base, a connecting plate, a support plate and a detection pressure head, the mounting base is mounted on the top of the frame box, the connecting plate is mounted on the top of the mounting base, the support plate is mounted on the top of the connecting plate, a guide shaft movably passes through the support plate, a transition plate is mounted on the bottom end of the guide shaft, the detection pressure head is mounted on the bottom of the transition plate, a force sensor is mounted on the top of the transition plate, and a connecting tooling is mounted on the top of the force sensor.

[0007] Preferably, the above-mentioned mating part mounting assembly includes a fixed base, a mating part mounting seat and a locking nut, the fixed base is mounted on the top of the mounting base, the mating part mounting seat is mounted on the top of the fixed base, a deep groove is provided on the top of the mating part mounting seat, an internal thread groove is provided on the top of the mating part mounting seat above the deep groove, the locking nut is connected to the inner side of the internal thread groove through a thread, a socket is provided on the locking nut, and a high-pressure oil inlet valve mating part is installed on the inner side of the internal thread groove.

[0008] Preferably, the above-mentioned high-pressure oil inlet valve pair includes a pair valve body, a pair valve core and a spring, the pair valve body is installed at the bottom of the internal thread groove, the pair valve core is installed inside the pair valve body, the spring is sleeved on the outside of the pair valve core, and one end of the pair valve core is located inside the deep groove.

[0009] Preferably, a positioning pin is fixedly connected to the top of the fixed base, a positioning hole is opened at the bottom of the pair mounting seat, and the positioning pin is located inside the positioning hole.

[0010] Preferably, the servo electric cylinder is fixedly connected to the top of the support plate, and the push rod of the servo electric cylinder is fixedly connected to the top of the connecting tooling.

[0011] Preferably, the control system components described above include a signal acquisition card, an industrial computer and a servo cylinder controller, and the signal acquisition card, the industrial computer and the servo cylinder controller are respectively arranged inside a box on the frame.

[0012] Preferably, the signal output end of the signal acquisition card is connected to the signal input end of the industrial computer, the signal end of the industrial computer is connected to the signal end of the servo cylinder controller, and the signal output end of the servo cylinder controller is connected to the signal input end of the servo cylinder.

[0013] Preferably, a guide bearing is installed on the top of the support plate, and the guide shaft is connected to the inside of the guide bearing.

[0014] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects: The present invention places the high-pressure oil inlet valve pair inside the internal thread groove, and places the bottom of the pair valve body at the bottom of the internal thread groove. At this time, the pair valve core and the spring are located inside the deep groove, and then the locking nut is screwed into the internal thread groove so that the bottom of the locking nut contacts the top of the pair valve body, thereby quickly completing the installation and fixation of the high-pressure oil inlet valve pair.

[0015] The present invention can perform fatigue detection on the high-pressure oil inlet valve pair by passing one end of the detection pressure head through the inside of the jack on the locking nut; during the detection process, the real-time value of the feedback force of the force sensor is transmitted to the industrial computer through the signal acquisition card, and the output signal of the servo electric cylinder controller is adjusted in a closed loop according to the program set in the industrial computer. Then, the push rod of the servo electric cylinder drives the detection tooling assembly to reciprocate up and down at a certain frequency and a certain force, thereby realizing the fixed frequency and fixed force value fatigue test of the high-pressure oil inlet valve pair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the framework structure of the present invention; Figure 2 It is a schematic diagram of the structure of the detection tooling assembly of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the detection tooling assembly of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure of the middle A area; Figure 5 It is a schematic diagram of the control system component structure of the present invention; Figure 6 It is a structural schematic diagram of the present invention; Figure 7 It is a schematic diagram of the structure of the mating parts installation assembly of the present invention.

[0018] Explanation of the reference numerals in the accompanying drawings: 1. Frame; 2. Detection tooling assembly; 21. Mounting base; 22. Connecting plate; 23. Support plate; 24. Guide shaft; 25. Transition plate; 26. Force sensor; 27. Connecting tooling; 28. Detection pressure head; 29. ​​Guide bearing; 3. Coupler mounting assembly; 31. Fixed base; 32. Positioning pin; 33. Coupler mounting seat; 34. Deep groove; 35. Internal thread groove; 36. Locking nut; 37. Socket; 38. Coupler valve body; 39. Coupler valve core; 310. Spring; 311. Positioning hole; 4. Servo electric cylinder; 5. Control system assembly; 51. Signal acquisition card; 52. Industrial computer; 53. Servo electric cylinder controller. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application. Example

[0021] See also Figure 1-7 The present invention provides a technical solution: a fatigue testing device for a high-pressure oil inlet valve pair, comprising a frame 1; a detection tooling assembly 2, which is installed inside the frame 1 and is used for fatigue testing of the high-pressure oil inlet valve pair; a pair mounting assembly 3, which is installed on the detection tooling assembly 2 and is used to fix the high-pressure oil inlet valve pair; a servo electric cylinder 4; the servo electric cylinder 4 is installed on the top of the detection tooling assembly 2 and is used to assist in the detection of the detection tooling assembly 2; a control system assembly 5, which is arranged inside the box of the frame 1 and is used to realize a fixed frequency and fixed force value fatigue test of the high-pressure oil inlet valve pair.

[0022] By setting up the detection tooling assembly 2, fatigue detection of the high-pressure oil inlet valve pair can be performed; the detection tooling assembly 2 includes a mounting base 21, a connecting plate 22, a support plate 23 and a detection pressure head 28, the mounting base 21 is mounted on the top of the frame 1 box, the connecting plate 22 is mounted on the top of the mounting base 21, the support plate 23 is mounted on the top of the connecting plate 22, a guide shaft 24 is movably penetrated on the support plate 23, a transition plate 25 is mounted on the bottom end of the guide shaft 24, the detection pressure head 28 is mounted on the bottom of the transition plate 25, a force sensor 26 is mounted on the top of the transition plate 25, a connecting tooling 27 is mounted on the top of the force sensor 26, and the servo electric cylinder 4 is fixedly connected to the support At the top of the plate 23, the push rod of the servo electric cylinder 4 is fixedly connected to the top of the connecting tooling 27; a guide bearing 29 is installed on the top of the support plate 23, and the guide shaft 24 is connected to the inside of the guide bearing 29; through the extension of the push rod of the servo electric cylinder 4, the push rod of the servo electric cylinder 4 drives the force sensor 26 on the connecting tooling 27 to move downward, and then the force sensor 26 drives the detection pressure head 28 at the bottom of the transition plate 25 to move downward, and when the guide shaft 24 slides inside the guide bearing 29, it can ensure that the detection pressure head 28 moves downward smoothly, and then one end of the detection pressure head 28 passes through the inside of the socket 37 on the locking nut 36, so that the high-pressure oil inlet valve pair can be detected.

[0023] By setting the mating component installation assembly 3, the installation and fixation of the high-pressure oil inlet valve mating component can be quickly completed; the mating component installation assembly 3 includes a fixed base 31, a mating component installation seat 33 and a locking nut 36, the fixed base 31 is installed on the top of the installation base 21, the mating component installation seat 33 is installed on the top of the fixed base 31, a deep groove 34 is opened on the top of the mating component installation seat 33, and an internal thread groove 35 is arranged on the top of the mating component installation seat 33 above the deep groove 34, the locking nut 36 is connected to the inner side of the internal thread groove 35 through a thread, and a socket 37 is arranged on the locking nut 36, and the high-pressure oil inlet valve mating component is installed on the inner side of the internal thread groove 35; the high-pressure oil inlet valve mating component includes a mating component valve body 38, the pair valve core 39 and the spring 310, the pair valve body 38 is installed at the bottom of the internal thread groove 35, the pair valve core 39 is installed inside the pair valve body 38, the spring 310 is sleeved on the outside of the pair valve core 39, and one end of the pair valve core 39 is located inside the deep groove 34; by placing the high-pressure oil inlet valve pair inside the internal thread groove 35, the bottom of the pair valve body 38 is placed at the bottom of the internal thread groove 35, at this time, the pair valve core 39 and the spring 310 are located inside the deep groove 34, and then the locking nut 36 is screwed into the inside of the internal thread groove 35, so that the bottom of the locking nut 36 is in contact with the top of the pair valve body 38, and the installation of the high-pressure oil inlet valve pair is completed.

[0024] In order to facilitate the installation of the mating part mounting seat 33, a positioning pin 32 is fixedly connected to the top of the fixed base 31, and a positioning hole 311 is opened at the bottom of the mating part mounting seat 33, and the positioning pin 32 is located inside the positioning hole 311; when the fixed base 31 is installed, the positioning hole 311 at the bottom of the mating part mounting seat 33 is sleeved on the outside of the positioning pin 32, so as to complete the positioning of the mating part mounting seat 33.

[0025] By setting up the control system component 5, the fatigue test of the high-pressure oil inlet valve pair can be completed; the control system component 5 includes a signal acquisition card 51, an industrial computer 52 and a servo electric cylinder controller 53, and the signal acquisition card 51, the industrial computer 52 and the servo electric cylinder controller 53 are respectively arranged inside the box on the frame 1; the signal output end of the signal acquisition card 51 is connected to the signal input end of the industrial computer 52, the signal end of the industrial computer 52 is connected to the signal end of the servo electric cylinder controller 53, and the signal output end of the servo electric cylinder controller 53 is connected to the signal input end of the servo electric cylinder 4; during the detection process, the real-time value of the feedback force of the force sensor 26 is transmitted to the industrial computer 52 through the signal acquisition card 51, and the output signal of the servo electric cylinder controller 53 is closed-loop adjusted according to the program set in the industrial computer 52, and then the push rod of the servo electric cylinder 4 drives the detection tooling component 2 to reciprocate up and down according to a certain frequency and a certain force, thereby realizing the fixed frequency and fixed force value fatigue test of the high-pressure oil inlet valve pair.

[0026] Working principle or structural principle, when the high-pressure oil inlet valve pair needs to be installed, the high-pressure oil inlet valve pair is placed inside the internal thread groove 35, and the bottom of the pair valve body 38 is placed at the bottom of the internal thread groove 35. At this time, the pair valve core 39 and the spring 310 are located inside the deep groove 34, and then the locking nut 36 is screwed into the internal thread groove 35, so that the bottom of the locking nut 36 is in contact with the top of the pair valve body 38, and the installation and fixation of the high-pressure oil inlet valve pair can be quickly completed.

[0027] When the fatigue test is performed on the high-pressure oil inlet valve pair, the push rod of the servo electric cylinder 4 is extended, and the push rod of the servo electric cylinder 4 drives the force sensor 26 on the connecting tooling 27 to move downward, and then the force sensor 26 drives the detection pressure head 28 at the bottom of the transition plate 25 to move downward. When the guide shaft 24 slides inside the guide bearing 29, it can ensure that the detection pressure head 28 moves downward smoothly, and then one end of the detection pressure head 28 passes through the inside of the socket 37 on the locking nut 36, and the fatigue test of the high-pressure oil inlet valve pair can be performed; during the test, the real-time value of the feedback force of the force sensor 26 is transmitted to the industrial computer 52 through the signal acquisition card 51, and the output signal of the servo electric cylinder controller 53 is adjusted in a closed loop according to the program set in the industrial computer 52, and then the push rod of the servo electric cylinder 4 drives the detection tooling assembly 2 to reciprocate up and down at a certain frequency and a certain force, thereby realizing the fixed frequency and fixed force value fatigue test of the high-pressure oil inlet valve pair.

[0028] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A fatigue testing device for high-pressure oil inlet valve components, characterized in that: Includes framework (1); A detection tool assembly (2), the detection tool assembly (2) being installed inside the frame (1), the detection tool assembly (2) being used for fatigue detection of high-pressure oil inlet valve components; A mating component installation assembly (3), the mating component installation assembly (3) being installed on the detection tooling assembly (2), and the mating component installation assembly (3) being used to fix the high-pressure oil inlet valve mating component; A servo electric cylinder (4); the servo electric cylinder (4) is mounted on the top of the detection tooling assembly (2), and the servo electric cylinder (4) is used to assist in the detection of the detection tooling assembly (2); A control system component (5), the control system component (5) being arranged inside a box of the frame (1), and the control system component (5) being used to implement a constant frequency and constant force value fatigue test of a high-pressure oil inlet valve pair.

2. A fatigue testing device for high pressure oil inlet valve pair according to claim 1, characterized in that: The detection tooling assembly (2) comprises a mounting base (21), a connecting plate (22), a support plate (23) and a detection pressure head (28), wherein the mounting base (21) is mounted on the top of the frame (1) box, the connecting plate (22) is mounted on the top of the mounting base (21), the support plate (23) is mounted on the top of the connecting plate (22), a guide shaft (24) movably passes through the support plate (23), a transition plate (25) is mounted at the bottom end of the guide shaft (24), the detection pressure head (28) is mounted on the bottom of the transition plate (25), a force sensor (26) is mounted on the top of the transition plate (25), and a connection tooling (27) is mounted on the top of the force sensor (26).

3. A fatigue testing device for high pressure oil inlet valve pair according to claim 2, characterized in that: The mating component mounting assembly (3) comprises a fixed base (31), a mating component mounting seat (33) and a locking nut (36); the fixed base (31) is mounted on the top of the mounting base (21); the mating component mounting seat (33) is mounted on the top of the fixed base (31); a deep groove (34) is provided on the top of the mating component mounting seat (33); an internal thread groove (35) is provided on the top of the mating component mounting seat (33) above the deep groove (34); the locking nut (36) is connected to the inner side of the internal thread groove (35) through a thread; a plug hole (37) is provided on the locking nut (36); and a high-pressure oil inlet valve mating component is installed on the inner side of the internal thread groove (35).

4. A fatigue testing device for a high-pressure oil inlet valve pair according to claim 3, characterized in that: The high-pressure oil inlet valve pair comprises a pair valve body (38), a pair valve core (39) and a spring (310); the pair valve body (38) is mounted on the bottom of the internal thread groove (35); the pair valve core (39) is mounted inside the pair valve body (38); the spring (310) is sleeved on the outside of the pair valve core (39); and one end of the pair valve core (39) is located inside the deep groove (34).

5. A fatigue testing device for high-pressure oil inlet valve components according to claim 3, characterized in that: A positioning pin (32) is fixedly connected to the top of the fixed base (31), a positioning hole (311) is provided at the bottom of the pair mounting seat (33), and the positioning pin (32) is located inside the positioning hole (311).

6. A fatigue testing device for high pressure oil inlet valve pair according to claim 2, characterized in that: The servo electric cylinder (4) is fixedly connected to the top of the support plate (23), and the push rod of the servo electric cylinder (4) is fixedly connected to the top of the connecting tool (27).

7. A fatigue testing device for a high-pressure oil inlet valve pair according to claim 1, characterized in that: The control system component (5) comprises a signal acquisition card (51), an industrial computer (52) and a servo electric cylinder controller (53); the signal acquisition card (51), the industrial computer (52) and the servo electric cylinder controller (53) are respectively arranged inside a box on the frame (1).

8. A fatigue testing device for a high-pressure oil inlet valve pair according to claim 7, characterized in that: The signal output end of the signal acquisition card (51) is connected to the signal input end of the industrial computer (52), the signal end of the industrial computer (52) is connected to the signal end of the servo electric cylinder controller (53), and the signal output end of the servo electric cylinder controller (53) is connected to the signal input end of the servo electric cylinder (4).

9. A fatigue testing device for a high-pressure oil inlet valve pair according to claim 2, characterized in that: A guide bearing (29) is installed on the top of the support plate (23), and the guide shaft (24) is connected to the inside of the guide bearing (29).

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