Fuel pump bracket leakage detection system for medium-speed diesel engine

Abstract

The utility model discloses a fuel pump bracket leakage detection system for a medium-speed diesel engine. The fuel pump bracket leakage detection system comprises plane end face sealing assemblies, a water inlet end sealing assembly, a pump pressure assembly and a water source, the plane end face sealing assembly detachably seals all plane water holes of the fuel pump bracket. The water inlet end sealing assembly is detachably arranged at a water inlet in the top end of the fuel pump bracket in a sealed mode and provided with a water inlet ball valve. The water outlet end sealing assembly is detachably arranged at a water outlet in the other end of the fuel pump bracket in a sealed mode and provided with a water outlet ball valve. The pumping pressure assembly pumps water source pressure to a water inlet of the fuel pump bracket in an adjustable mode, and on-off of water supply is controlled through a water inlet ball valve of the water inlet end sealing assembly. The system is simple in structure, low in cost and convenient to operate, and can effectively detect whether the casting quality of the medium-speed diesel engine fuel pump bracket is qualified or not, improve the working efficiency and reduce the mass loss rate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine especially relates to a kind of for medium-speed diesel engine fuel pump bracket leakage detection system and detection method, specifically, it is a kind of system for examining the casting quality of fuel pump bracket by water pressure detection method, to improve the casting quality detection efficiency of fuel pump bracket, ensure its reliability and safety in diesel engine operation. BACKGROUND

[0002] Diesel engine as the core power device of large equipment such as ship, generator set, the quality and reliability of its parts directly affect the operating efficiency and safety of the whole equipment. Each process should be strictly in accordance with the requirements of process and drawing, after a process must be strictly inspected by professional inspection personnel, meet the requirements to carry out the next process, for each finished part is to be meticulous. The product quality of part casting is particularly important, and the material of fuel pump bracket as a load-bearing important component is cast iron. Fuel pump bracket as an important load-bearing component of diesel engine, usually adopts integral casting process, and the material is mostly cast iron. Because of its complex structure and large bearing pressure, the casting quality of fuel pump bracket is particularly important. If there are defects in the casting process, such as pores, cracks, etc., it may cause fuel pump bracket to leak during use, and then affect the normal operation of diesel engine.

[0003] At present, the casting quality detection of fuel pump bracket mainly depends on traditional visual inspection and non-destructive testing methods, such as ultrasonic testing, X-ray testing, etc. However, these methods have certain limitations: visual inspection is difficult to find internal defects, non-destructive testing method is high in cost, and the operation is complex, which is difficult to carry out rapid and efficient detection in batch production. In addition, the existing detection method can only be carried out after fuel pump bracket is processed, and cannot find defects in time during casting, which leads to great difficulty in subsequent repair, and even may cause quality problems that cannot be repaired.

[0004] Therefore, it is urgent to provide a system and method for rapid and efficient detection after fuel pump bracket is cast and before it is processed, to ensure that the casting quality of fuel pump bracket meets the requirements, and to avoid leakage problems caused by casting defects. UTILITY MODEL CONTENTS

[0005] In order to overcome the shortcomings of the prior art, the utility model aims at providing a kind of for medium-speed diesel engine fuel pump bracket leakage detection system and detection method, by water pressure detection method, the casting quality of fuel pump bracket can be effectively inspected before processing, to reduce the quality loss rate, improve production efficiency, solve the situation that product leakage is caused by quality problem of existing fuel pump bracket blank quality defect.

[0006] The technical scheme of the utility model discloses as follows:

[0007] A kind of for medium-speed diesel engine fuel pump bracket leakage detection system, system includes plane end face sealing assembly, water inlet end sealing assembly, water outlet end sealing assembly, pump pressure component and water source;The plane end face sealing assembly detachably seals the plane of fuel pump bracket and water hole;The water inlet end sealing assembly is detachably sealed and is arranged at the water inlet of one end of fuel pump bracket, and water inlet ball valve is arranged;The water outlet end sealing assembly is detachably sealed and is arranged at the water outlet of the other end of fuel pump bracket, and water outlet ball valve is arranged;The pump pressure component is pumped to the water inlet of one end of fuel pump bracket with adjustable water source pressure, and the on-off of water supply is controlled by the water inlet ball valve of water inlet end sealing assembly;And the on-off of drainage is controllable by the water outlet ball valve on water outlet end sealing assembly.

[0008] The bottom large plane sealing unit includes an end face flange, a gasket, a sealing rubber strip, a bolt and a nut, the end face flange and the gasket are installed on the bottom large plane, and the sealing rubber strip is clamped between the bottom large plane, and the end face flange and the top plane are fixed by the bolt and the nut to ensure no gap.

[0009] The end face sealing unit includes an end face flange and a gasket, which are fixed on the end face of the fuel pump bracket by bolts to ensure no gap.

[0010] The water inlet end sealing assembly includes a screw plug and a water inlet ball valve, the screw plug is connected with a threaded hole, and the water inlet ball valve is arranged on the upper portion of the screw plug and communicates with a water cavity.

[0011] The pump pressure component includes an electric pressure test pump, a filter, a rigid water pipe and a pressure gauge, one end of the electric pressure test pump is connected with the filter and a water source in sequence through the rigid water pipe, and the other end of the electric pressure test pump is connected with the pressure gauge and the water inlet ball valve in sequence through the rigid water pipe.

[0012] The detection method of the utility model discloses as follows:

[0013] Install the plane end face sealing assembly (100) on each plane and water hole of the fuel pump bracket to ensure that the sealing has no leakage.

[0014] The water inlet end sealing assembly (200) and the water outlet end sealing assembly (300) are respectively installed at the water inlet and the water outlet of the fuel pump bracket;

[0015] The electric pressure test pump (27) is connected with the water inlet ball valve (19) through the rigid water pipe (26), and a control switch is arranged on the water pipe;

[0016] The water source (500) is connected with the electric pressure test pump (27) through the filter (25).

[0017] The water inlet ball valve (19) is opened, the water outlet ball valve is closed, the electric pressure test pump (27) is started, and the water pressure is pumped to the water inlet of the fuel pump bracket;

[0018] According to the CAE checking calculation result, the water injection pressure is adjusted to 1.5 Bar, and the pressure is kept for 20 minutes;

[0019] The reading of the pressure gauge (28) is observed, if the pressure is kept stable within 20 minutes, it indicates that the fuel pump bracket has no leakage, and the casting quality is qualified;

[0020] If the pressure continues to decrease, it indicates that the fuel pump bracket has casting defects, and needs to be repaired.

[0021] After detection is completed, the electric pressure test pump (27) is closed, the water outlet ball valve is opened, and the water in the fuel pump bracket is discharged;

[0022] The water inlet end sealing assembly (200), the water outlet end sealing assembly (300) and the plane end face sealing assembly (100) are disassembled, and the detection process is completed.

[0023] The technical effects of the utility model are as follows:

[0024] The utility model discloses a water pressure detection method, which can quickly and efficiently detect the casting quality of the fuel pump bracket before machining, avoiding the limitations of traditional detection methods.

[0025] The utility model discloses a water pressure detection method, which can quickly and efficiently detect the casting quality of the fuel pump bracket before machining, avoiding the limitations of traditional detection methods.

[0026] The utility model discloses a water pressure detection method, which can quickly and efficiently detect the casting quality of the fuel pump bracket before machining, avoiding the limitations of traditional detection methods. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1It is the front view of the utility model for medium speed diesel engine fuel pump bracket leakage detection system.

[0028] Figure 2 It is the rear view of the utility model for medium speed diesel engine fuel pump bracket leakage detection system. DETAILED DESCRIPTION

[0029] The utility model will be further described in detail below in combination with the drawings and examples, but the protection scope of the utility model cannot be limited by this.

[0030] Please refer to Figure 1 , Figure 1 It is the front view of the utility model for medium speed diesel engine fuel pump bracket leakage detection system, as shown in the figure, a kind of for medium speed diesel engine fuel pump bracket leakage detection system, comprising the following components:

[0031] Plane end face sealing assembly (100): for sealing the plane and water hole of fuel pump bracket;

[0032] Water inlet end sealing assembly (200): for sealing the water inlet of fuel pump bracket, and being equipped with water inlet ball valve (19);

[0033] Water outlet end sealing assembly (300): for sealing the water outlet of fuel pump bracket, and being equipped with water outlet ball valve;

[0034] Pump pressure assembly (400): for the pressure of water source (500) is pumped to the water inlet of fuel pump bracket adjustably;

[0035] Water source (500): for providing the water required for detection.

[0036] Plane end face sealing assembly (100) includes bottom large plane sealing unit and end face sealing unit, wherein bottom large plane sealing unit: by end face flange (15), gasket (16), sealing rubber strip (20), second bolt (23) and nut (24) are formed. End face flange (15) is installed with gasket (16) on the bottom large plane of fuel pump bracket, and sealing rubber strip (20) is clamped between the bottom plane, and the flange is fixed with the top plane by second bolt (23) and nut (24), to ensure no gap. End face sealing unit, including a plurality of end face flanges (1-14) and gaskets (6-14), is fixed on each end face of fuel pump bracket by first bolt (22), to ensure no gap. In addition, the plugs (17, 18) are used to plug the small holes on the fuel pump bracket, to ensure the sealing property.

[0037] Water inlet end sealing assembly (200) includes screw plug (21) and water inlet ball valve (19). The screw plug (21) is connected with the threaded hole of the water inlet of fuel pump bracket;The water inlet ball valve (19) is arranged on the upper portion of screw plug and is communicated with water cavity, for controlling the on-off of water supply.

[0038] The water outlet end sealing assembly (300) comprises a screw plug (21) and a water outlet ball valve. The screw plug (21) is connected with the threaded hole of the fuel pump bracket water outlet; the water outlet ball valve is arranged on the upper portion of the screw plug and communicates with the water cavity, and is used for controlling the on-off of water drainage.

[0039] The pump pressure assembly (400) comprises:

[0040] The electric pressure test pump (27) is used for providing pressure, and the model is DY-165 / 6, which is driven by an electric motor;

[0041] The filter (25) is used for filtering impurities in the water source, and ensuring the water quality to be clean;

[0042] The rigid water pipe (26) is used for connecting the electric pressure test pump (27), the filter (25), the water source (500) and the water inlet ball valve (19);

[0043] The pressure gauge (28) is installed on the electric pressure test pump (27) and is used for monitoring water pressure.

[0044] Specific parameters:

[0045] The sealing screw plug adopts an M22*1.5 hexagonal head bolt; the full-thread bolt adopts an M12*25 and an M20*80 full-thread bolt (GBT5783), the nut adopts an M20 nut (GBT6178); the water inlet ball valve 19 adopts a G3 / 4 ball valve; the water outlet ball valve adopts a G11 / 2 ball valve; the electric pressure test pump 11 has a model of DY-165 / 6. A control switch is arranged on the connecting water pipe, and a stainless steel pressure gauge is installed on the electric pressure test pump 27 to monitor pressure. The electric pressure test pump 27 is driven by an electric motor.

[0046] Corresponding to the above detection system, a detection method for detecting water cavity leakage by using the detection system is provided, and the method comprises:

[0047] The test system is connected, water is pumped to the water inlet ball valve 19 (G3 / 4 ball valve) on the position close to the bottom sealing screw plug 21 by the electric pressure test pump 13, and water is discharged through the water outlet ball valve (G11 / 2 ball valve) on the top water outlet flange. A control switch is arranged on the connecting rigid water pipe 15 of the electric pressure test pump 13. A stainless steel pressure 16 gauge is installed on the electric pressure test pump 13 to monitor pressure.

[0048] Water pressure detection: the electric pressure test pump 13 pumps water for a certain period of time, and whether there is a significant pressure drop in the pumping process is observed. If a sudden pressure drop occurs during the continuous pumping process, it indicates that there is a water leakage phenomenon. If the water pressure increases stably and the pressure remains unchanged, it indicates that the rack has no water leakage phenomenon.

[0049] In the water pressure detection process, the pump pressure of the electric pressure test pump 13 is 1Mpa, and the pump water duration is 20min.

[0050] It has been verified by physical verification that the system and method can quickly detect whether the water leakage of the medium-speed diesel engine fuel pump bracket exists, and find out the oil leakage point in time for repair, thereby avoiding the quality problem of discovering the casting defects after installation.

[0051] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A system for leak detection of a medium speed diesel engine fuel pump bracket, characterized by, The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device.

2. A leakage detection system for a medium speed diesel engine fuel pump carrier according to claim 1, characterized in that, The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device.

3. A system for leak detection of a medium speed diesel fuel pump bracket as defined in claim 1, wherein: The application relates to a fuel pump bracket sealing device.

4. A leakage detection system for a medium speed diesel fuel pump bowl as defined in claim 1, wherein: The application relates to a fuel pump bracket sealing device.

5. A leakage detection system for a medium speed diesel fuel pump bowl as defined in claim 1, wherein: The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. The application relates to a fuel pump bracket sealing device. 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