CN115165249A

CN115165249A - High-pressure test device and method for combustion surface of cylinder cover and application

Info

Publication number: CN115165249A
Application number: CN202210819308.3A
Authority: CN
Inventors: 江泽平; 鲍亮; 方帆
Original assignee: Anqing Cssc Mating Power Co ltd
Current assignee: Anqing Cssc Mating Power Co ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-10-11

Abstract

The invention relates to a cylinder cover combustion surface high-pressure test device, a method and application, and the device comprises a bottom plate, wherein the upper surface of the bottom plate is provided with a sealing seat which is used for being in sealing butt joint with a combustion surface of a cylinder cover, a hydraulic column which is used for pressing the cylinder cover is also arranged, and the test device also comprises an oil pump which is used for providing hydraulic pressure for the sealing seat and the hydraulic column. This test device sets up the oil pump and provides hydraulic pressure for seal receptacle hydraulic column simultaneously for the combustion face of cylinder head equals with the stress surface pressure of hydraulic column, and the total lifting surface area of hydraulic column is greater than the area of combustion face, then can make the hydraulic column obtain the power of enough fixed cylinder head, and can not excessively exert, can not cause the phenomenon that the contact surface damaged, the pressure of hydraulic column and combustion face increases step by step, it is balanced mutually, both reach fixed effect, can not make the cylinder head excessively bear with the contact surface of seal receptacle again.

Description

High-pressure test device and method for combustion surface of cylinder cover and application

Technical Field

The invention belongs to the technical field of cylinder cover high-pressure tests, and particularly relates to a cylinder cover combustion surface high-pressure test device, a method and application.

Background

When the diesel engine works, the combustion surface of the cylinder cover of the diesel engine needs to bear strong impact force generated by combustion of diesel oil in the cylinder body, so that how to effectively perform a high-pressure test on the combustion surface of the cylinder cover is to avoid serious consequences such as cooling water leakage and the like caused by damage of the combustion surface due to combustion pressure during operation, the high-pressure test is a vital test, the test aims at verifying the strength of the combustion surface of the cylinder cover, and the test pressure is determined according to a coefficient of 1.5 times of the actual working condition.

The large-bore cylinder cover has large acting force on the tool in a high-pressure test, and takes an M390 type cylinder cover as an example, the cylinder diameter of the large-bore cylinder cover is 390mm, and the area of a combustion surface is 0.119M ² When the test pressure of 35Mp is reached, the stress between the tool and the cylinder cover reaches 4165000N, so that the fixing and sealing effects of the tool are greatly tested, the contact surface between the cylinder cover and the tool can be damaged in advance by the huge fixing force before the test, and if the tool is not tightly fixed before the test, leakage can be caused in the pressurizing process.

Disclosure of Invention

The invention aims to solve the problems and provide a cylinder head combustion surface high-pressure test device, a method and application which are simple in structure and reasonable in design.

The invention achieves the above purpose through the following technical scheme:

a high-pressure test device for a combustion surface of a cylinder cover comprises a base plate, wherein a sealing seat used for being in sealing butt joint with the combustion surface of the cylinder cover is arranged on the upper surface of the base plate, a hydraulic column used for pressing the cylinder cover is further arranged, the test device further comprises an oil pump used for providing hydraulic pressure for the sealing seat and the hydraulic column, the oil pump respectively provides hydraulic pressure for the sealing seat and the hydraulic column through a first branch pipe and a second branch pipe, and a pressure dividing mechanism is arranged in the first branch pipe;

the pressure dividing mechanism is used for alternately pressurizing the sealing seat and the hydraulic column, and comprises a shell and a piston column sliding in the shell, wherein the piston column divides the shell into a first cavity and a second cavity, a through hole is formed in the surface of the piston column, a spring is arranged in the first cavity and used for pushing the piston column to block the first branch pipe, the first cavity is communicated with the rear end of the first branch pipe through a first feedback pipe, and the second cavity is communicated with the second branch pipe through a second feedback pipe.

As a further optimization scheme of the invention, the sealing seat comprises a slot, a sealing ring is arranged between the slot and the cylinder cover, a buffer ring for delaying hydraulic impact is arranged in the slot, a positioning pin for butting and positioning with a mounting hole on the surface of the cylinder cover is arranged on the upper surface of the sealing seat, and a first pressure release valve is further arranged at the bottom end of the slot.

As a further optimized scheme of the invention, a first pressure gauge and a second pressure gauge are respectively arranged inside the first branch pipe and the second branch pipe, and a second pressure relief valve is arranged inside the second branch pipe.

As a further optimization scheme of the invention, the hydraulic column is arranged in the hydraulic cylinder, the hydraulic column is contacted with the top surface of the cylinder cover through an output column fixed at the end of the hydraulic column, the hydraulic cylinder is fixed on the surface of the cross rod, and the surface of the bottom plate is provided with a vertical rod for assembling the cross rod.

As a further optimization scheme of the invention, the side surface of the vertical rod is provided with a hook groove for placing a cross rod, a buckle plate is arranged at the opening of the hook groove, and the center of the surface of the cross rod is provided with a lifting hook for lifting the cross rod.

A method for carrying out a high-pressure test on a combustion surface of a cylinder cover by using the device comprises the following steps:

s1: positioning the cylinder cover, butting the mounting hole on the surface of the cylinder cover with the positioning pin, and then installing a cross rod to enable an output column on the surface of the cross rod to be aligned with the upper surface of the cylinder cover;

s2: alternately pressurizing, starting an oil pump to pressurize the hydraulic column to enable an output column to press a cylinder cover tightly, pushing a piston column to enable a first branch pipe to be conducted when the pressure difference between a second branch pipe and the first branch pipe overcomes the resistance of a spring, pressurizing a sealing seat, and blocking the first branch pipe by the piston column when the pressure difference is not enough to overcome the elasticity of the spring, and continuously pressurizing the second branch pipe to repeatedly perform;

s3: and (4) performing a pressure maintaining test, namely closing the oil pump and each valve when the pressure reaches 35Mp, maintaining the pressure for 30min, and observing whether the reading of each pressure gauge changes.

The application of the test method in the high-pressure test of the combustion surface of the cylinder cover of the engine is disclosed.

The invention has the beneficial effects that:

according to the invention, the oil pump is arranged and the hydraulic pressure is provided for the sealing seat hydraulic column at the same time, so that the pressure intensity of the combustion surface of the cylinder cover is equal to that of the stress surface of the hydraulic column, and the total stress area of the hydraulic column is larger than that of the combustion surface, so that the hydraulic column can obtain enough force for fixing the cylinder cover without excessive application, and the phenomenon of damage to the contact surface can not be caused, and the pressure of the hydraulic column and the combustion surface is gradually increased and balanced mutually, so that the fixing effect is achieved, and the contact surface of the cylinder cover and the sealing seat can not be excessively loaded.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the interface between the seal housing and the cylinder head of the present invention;

FIG. 3 is a schematic view of the pressure divider mechanism of the present invention;

FIG. 4 is a cross bar mounting schematic of the present invention;

FIG. 5 is a bottom view of the cylinder head;

in the figure: 1. a base plate; 2. a sealing seat; 21. inserting slots; 22. a buffer ring; 23. a seal ring; 24. a first pressure relief valve; 25. positioning pins; 3. a vertical rod; 31. hooking a groove; 32. a cross bar; 33. buckling the plate; 34. a hydraulic cylinder; 35. a hydraulic column; 36. an output column; 37. a hook; 41. an oil pump; 42. a first branch pipe; 43. a second branch pipe; 44. a first pressure gauge; 45. a second pressure relief valve; 46. a second pressure gauge; 5. a pressure dividing mechanism; 51. a housing; 52. a piston post; 53. a through hole; 54. a first feedback tube; 55. a second feedback tube; 56. a spring; 6. a cylinder head; 61. a burning surface; 62. a seal member; 63. and (7) mounting holes.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Example 1

As shown in fig. 1-4, a cylinder head combustion surface high pressure test device comprises a base plate 1, wherein a sealing seat 2 used for being in sealing butt joint with a combustion surface 61 of a cylinder head 6 is arranged on the upper surface of the base plate 1, a hydraulic column 35 used for compressing the cylinder head 6 is further arranged, the test device further comprises an oil pump 41 used for providing hydraulic pressure for the sealing seat 2 and the hydraulic column 35, the oil pump 41 provides hydraulic pressure for the sealing seat 2 and the hydraulic column 35 through a first branch pipe 42 and a second branch pipe 43 respectively, and a pressure dividing mechanism 5 is arranged inside the first branch pipe 42.

Give seal receptacle 2 hydraulic pressure post 35 simultaneously through the oil pump and provide hydraulic pressure, make the combustion face 61 of cylinder head 6 equal with the stress surface pressure of hydraulic pressure post 35, and the total lifting surface area of hydraulic pressure post 35 is greater than the area of combustion face 61, then can make hydraulic pressure post 35 obtain the power of enough fixed cylinder head 6, and can not excessively exert, and before the pressurization, hydraulic pressure post 35 is less to the pressure of cylinder head 6, can not cause the phenomenon that the contact surface damaged, hydraulic pressure post 35 increases step by step with the pressure of combustion face 61, it is balanced mutually, both reach fixed effect, can not make cylinder head 6 and seal receptacle 2's contact surface damage again.

The pressure dividing mechanism 5 is used for alternately pressurizing the seal holder 2 and the hydraulic column 35, and includes a housing 51, and a piston column 52 sliding inside the housing 51, the housing 51 is divided into a first chamber and a second chamber by the piston column 52, a through hole 53 is formed in the surface of the piston column 52, a spring 56 is arranged inside the first chamber and used for pushing the piston column 52 to block the first branch pipe 42, the first chamber is communicated with the rear end of the first branch pipe 42 through a first feedback pipe 54, and the second chamber is communicated with the second branch pipe 43 through a second feedback pipe 55.

When the oil pump 41 is pressurizing, the second branch pipe 43 is pressurized first, the pressure of the second branch pipe 43 and the pressure at the rear end of the first branch pipe 42 act on both ends of the piston column 52 through the feedback pipes, respectively, when the pressure difference overcomes the elastic force of the spring 56, the piston column 52 is pushed to make the through hole 53 conduct the first branch pipe 42 and pressurize the inside of the seal seat 2, theoretically, when the pressure difference at both ends of the piston column 52 and the elastic force of the spring 56 reach dynamic balance, the first branch pipe 42 and the second branch pipe 43 are pressurized synchronously, and the pressure at the rear end of the first branch pipe 42 is lower than that of the second branch pipe 43, but in actual use, because the oil suction and oil discharge processes of the oil pump 41 are performed alternately, the actual pressurizing process of the first branch pipe 42 and the second branch pipe 43 is performed alternately, the second branch pipe 43 is pressurized first, when the piston column 52 is pushed due to the pressure difference, the pressure difference at both ends of the piston column 52 is not enough to overcome the elastic force of the spring 56, the piston column 52 blocks the first branch pipe 42 again, and then the second branch pipe 43 is pressurized alternately.

Piston post 52 makes the pressure that the second divides pipe 43 lead the pressure of first branch pipe 42 rear end all the time, hydraulic pressure is used in hydraulic pressure post 35 and seal receptacle 2, both increased the inside test pressure of seal receptacle 2, also corresponding increase the stationary force of hydraulic pressure post 35 to cylinder head 6, both ends power is balanced each other, and the stationary force remains throughout to be greater than test pressure, it is fixed firm not only, still make cylinder head 6 to the effort of contact surface between the seal receptacle 2 significantly reduce, effectively play the effect of fixing and protection.

Seal receptacle 2 includes slot 21, be provided with sealing washer 23 between slot 21 and the cylinder head 6, sealing washer 23 adopts high strength seal material, and carry out the axial, radial double seal, slot 21 is inside to be provided with the cushion ring 22 that delays hydraulic shock, the combustion surface 61 of cylinder head 6 still is provided with sealing member 62 and is used for the original hole of shutoff, the upper surface of seal receptacle 2 is provided with and is used for carrying out butt joint locating pin 25 with the mounting hole 63 on cylinder head 6 surface, the bottom of slot 21 still is provided with first relief valve 24, first minute pipe 42 divides the inside of pipe 43 to be provided with first manometer 44 and second manometer 46 respectively with the second, the inside second relief valve 45 that is provided with of second minute pipe 43.

The operation of the oil pump 41 also requires other necessary components such as a tank, a valve, etc. (not shown), wherein the tank is in communication with the first and second

pressure relief valves

24, 24.

Hydraulic column 35 sets up inside hydraulic cylinder 34, hydraulic column 35 contacts with 6 top surfaces of cylinder head through self end fixing's output post 36, hydraulic cylinder 34 is fixed on horizontal pole 32 surface, the surface of bottom plate 1 is provided with the montant 3 of assembly

horizontal pole

32, 3 side surfaces of montant offer the catching groove 31 that is used for putting into horizontal pole 32, and the catching groove 31 opening part is provided with buckle 33, the center department in surface of horizontal pole 32 is provided with the lifting hook 37 that is used for hoisting horizontal pole 32, through the bearing mode that sets up direct contact, make the catching groove 31 of montant 3 bear the reaction force of horizontal pole 32, in order to prevent that horizontal pole 32 from influencing the fixed of cylinder head 6, consequently, set up to the assembled, install through loop wheel machine and manual fit, horizontal pole 32 also can assemble through other modes.

In order to use the device, the application also provides a method for the high-pressure test of the combustion surface of the cylinder cover, which comprises the following steps:

s1: positioning the cylinder head 6, butting the mounting hole 63 on the surface of the cylinder head 6 with the positioning pin 25, and then installing the cross rod 32 to align the output column 36 on the surface of the cross rod 32 with the upper surface of the cylinder head 6;

s2: alternately pressurizing, starting the oil pump 41 to pressurize the hydraulic column 35, so that the output column 36 presses the cylinder cover 6 tightly, when the pressure difference between the second branch pipe 43 and the first branch pipe 42 overcomes the resistance of the spring 56, pushing the piston column 52 to conduct the first branch pipe 42, pressurizing the seal seat 2, when the pressure difference is not enough to overcome the elastic force of the spring 56, the first branch pipe 42 is blocked by the piston column 52, and continuously pressurizing the second branch pipe 43, so that the steps are repeated;

s3: and (4) a pressure maintaining test, wherein the oil pump 41 and each valve are closed when the pressure reaches 35Mp, the pressure is maintained for 30min, and whether the reading of each pressure gauge changes or not is observed.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. The utility model provides a cylinder head combustion surface high-pressure test device, includes bottom plate (1), its characterized in that: the testing device comprises a base plate (1), a sealing seat (2) and a hydraulic column (35), wherein the sealing seat (2) is used for being in sealing butt joint with a combustion surface (61) of a cylinder cover (6), the hydraulic column (35) is used for pressing the cylinder cover (6), the testing device further comprises an oil pump (41) which is used for providing hydraulic pressure for the sealing seat (2) and the hydraulic column (35), the oil pump (41) provides hydraulic pressure for the sealing seat (2) and the hydraulic column (35) through a first branch pipe (42) and a second branch pipe (43), and a pressure dividing mechanism (5) is arranged inside the first branch pipe (42);

the pressure dividing mechanism (5) is used for alternately pressurizing the sealing seat (2) and the hydraulic column (35), and comprises a shell (51) and a piston column (52) sliding in the shell (51), wherein the piston column (52) divides the shell (51) into a first chamber and a second chamber, a through hole (53) is formed in the surface of the piston column (52), a spring (56) is arranged in the first chamber and used for pushing the piston column (52) to block the first branch pipe (42), the first chamber is communicated with the rear end of the first branch pipe (42) through a first feedback pipe (54), and the second chamber is communicated with the second branch pipe (43) through a second feedback pipe (55).

2. The cylinder head combustion surface high pressure test device according to claim 1, characterized in that: the sealing seat (2) comprises a slot (21), a sealing ring (23) is arranged between the slot (21) and the cylinder cover (6), a buffering ring (22) for delaying hydraulic impact is arranged inside the slot (21), the upper surface of the sealing seat (2) is provided with a mounting hole (63) for abutting joint with the surface of the cylinder cover (6) to position a positioning pin (25), and the bottom end of the slot (21) is further provided with a first pressure release valve (24).

3. The cylinder head combustion surface high pressure test apparatus of claim 1, wherein: the inside of first minute pipe (42) and second minute pipe (43) is provided with first manometer (44) and second manometer (46) respectively, second minute pipe (43) inside is provided with second relief valve (45).

4. The cylinder head combustion surface high pressure test apparatus of claim 1, wherein: hydraulic pressure post (35) set up in hydraulic pressure section of thick bamboo (34) inside, hydraulic pressure post (35) are through output post (36) and cylinder head (6) top surface contact of self end fixing, hydraulic pressure section of thick bamboo (34) are fixed on horizontal pole (32) surface, the surface of bottom plate (1) is provided with montant (3) of assembly horizontal pole (32).

5. The cylinder head combustion surface high pressure test device of claim 4, wherein: the side surface of the vertical rod (3) is provided with a hook groove (31) for placing a cross rod (32), a buckle plate (33) is arranged at the opening of the hook groove (31), and a hook (37) for hoisting the cross rod (32) is arranged at the center of the surface of the cross rod (32).

6. A method for performing a cylinder head combustion surface high pressure test using the apparatus of any one of claims 1 to 5, characterized by: the method comprises the following steps:

s1: positioning the cylinder cover (6), butting a mounting hole (63) on the surface of the cylinder cover (6) with the positioning pin (25), and then installing the cross rod (32) to align an output column (36) on the surface of the cross rod (32) with the upper surface of the cylinder cover (6);

s2: alternately pressurizing, starting an oil pump (41) to pressurize a hydraulic column (35) to enable an output column (36) to press a cylinder cover (6), pushing a piston column (52) to enable a first branch pipe (42) to be conducted when the pressure difference between a second branch pipe (43) and the first branch pipe (42) overcomes the resistance of a spring (56), pressurizing a sealing seat (2), and blocking the first branch pipe (42) by the piston column (52) when the pressure difference is not enough to overcome the elastic force of the spring (56) to continuously pressurize the second branch pipe (43) so as to repeatedly pressurize;

s3: and (3) in the pressure maintaining test, when the pressure reaches 35Mp, closing the oil pump (41) and each valve, maintaining the pressure for 30min, and observing whether the reading of each pressure gauge changes.

7. Use of the test method according to claim 6 for high-pressure testing of the combustion surface of a cylinder head of an engine.