Supercharging device of cetane number measuring machine

Abstract

The utility model discloses a cetane number measuring machine supercharging device which comprises a supercharger, a check valve, a hydraulic pump and an electromagnetic directional valve, the supercharger is connected with the check valve, a fuel oil outlet is formed in the side wall of the supercharger, a fuel oil inlet is formed in the bottom of the check valve, the electromagnetic directional valve is connected with the supercharger through an oil pipe, and the hydraulic pump is connected with the electromagnetic directional valve. The hydraulic pump is connected with the electromagnetic directional valve through an oil pipe, a high-pressure piston and a low-pressure piston which are in linkage are arranged in the supercharger, and the electromagnetic directional valve is used for controlling the flow direction of hydraulic oil to achieve reciprocating motion of the high-pressure piston and the low-pressure piston. The utility model has the advantages that: the supercharge ratio is high: stable high-pressure output is realized through the area ratio (10: 1) of the high-pressure piston and the low-pressure piston; a mechanical balance mechanism in a high-pressure area ensures that the pressure is constant, and pressure is automatically supplemented during leakage; the electromagnetic reversing valve and the proportional overflow valve are integrated, so that dependence on external elements is reduced; due to neutral-position unloading of the reversing valve, invalid energy consumption is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of internal combustion engine fuel performance testing equipment, specifically relating to a cetane number measuring machine booster device, and more particularly to a booster device with high boost ratio, automatic pressure holding and cyclic pressure replenishment functions. Background Technology

[0002] Due to their unique geographical and climatic conditions, high-altitude regions have specific requirements for the quality of refined petroleum products. For example, the lower atmospheric pressure at high altitudes can affect the combustion efficiency and emission characteristics of refined petroleum products. Therefore, establishing a high-altitude refined petroleum product quality and safety laboratory is crucial for conducting relevant research and testing to ensure the performance and safety of refined petroleum products in high-altitude environments. The primary purpose of this laboratory is to ensure that refined petroleum products used in high-altitude environments meet relevant quality and safety standards, thereby guaranteeing the security and reliability of energy supply.

[0003] The cetane number analyzer is a key device for evaluating the auto-ignition performance of diesel fuel, simulating the combustion process of diesel fuel in an engine using a constant-volume combustion method. Existing turbocharging systems mostly employ mechanical turbocharging or direct hydraulic drive, which have the following drawbacks: 1. Low turbocharging efficiency: Traditional mechanical turbochargers are large, energy-intensive, and difficult to achieve high-frequency continuous turbocharging. 2. Unstable pressure holding: High-pressure fuel is prone to pressure fluctuations during testing due to leakage or load changes, affecting test accuracy. 3. Complex structure: Existing systems require additional pressure-holding valves and pressure-compensating devices, resulting in high maintenance costs and a high failure rate.

[0004] Existing publicly available boosting devices typically employ a dual-pump linkage structure, but their boosting ratio is fixed and cannot adapt to different fuel testing requirements. In addition, existing hydraulic pressure holding systems typically rely on external sensors to control pressure replenishment, resulting in slow response speed and insufficient reliability.

[0005] Therefore, there is an urgent need for a booster device with high integration, adjustable boost ratio, automatic pressure maintenance and real-time pressure replenishment. Utility Model Content

[0006] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a pressurization device for a cetane number tester. The device drives a high-low pressure linkage piston through a hydraulic pump and controls the oil circuit direction with an electromagnetic reversing valve to achieve high-frequency pressurization and automatic pressure holding. The device integrates a proportional overflow valve and a check valve to ensure stable high-pressure output and is suitable for the accurate determination of the cetane number of oil products.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0008] A pressurizing device for a cetane number tester includes a pressurizer, a check valve, a hydraulic pump, and a solenoid directional valve. The pressurizer is connected to the check valve. The pressurizer has a fuel outlet on its side wall, and the check valve has a fuel inlet at its bottom. The solenoid directional valve is connected to the pressurizer via an oil pipe, and the hydraulic pump is connected to the solenoid directional valve via an oil pipe. The pressurizer contains linked high and low pressure pistons, and the solenoid directional valve is used to control the flow direction of hydraulic oil to achieve the reciprocating motion of the high and low pressure pistons.

[0009] Furthermore, the high and low pressure pistons are linked by a rigid connecting rod, and the ratio of the area of ​​the low pressure piston to the area of ​​the high pressure piston is 10:1.

[0010] Further, it also includes a proportional relief valve, which is connected to a solenoid directional valve, and the proportional relief valve is used to regulate the output pressure and pressure holding stability.

[0011] Further specifying, the electromagnetic directional valve is a three-position four-way valve with a neutral unloading function, and the directional signal of the electromagnetic directional valve is triggered by piston displacement.

[0012] Furthermore, the internal high-pressure end of the booster is equipped with a one-way valve, which is used to isolate the oil pipe during the pressure holding stage.

[0013] Further specified, the maximum output pressure of the hydraulic pump is 19MPa, and the upper limit of the hydraulic pump pressure is set by a proportional relief valve.

[0014] Furthermore, the check valve is located between the fuel inlet and the turbocharger to prevent fuel backflow.

[0015] Further, it also includes a pressure sensor, which is installed on the oil pipe to monitor the oil pipe pressure in real time and feed it back to the proportional relief valve.

[0016] The beneficial effects of this utility model are:

[0017] 1. High boost ratio: Stable high-pressure output is achieved through a high-to-low pressure piston area ratio (10:1);

[0018] 2. Automatic pressure maintenance: The mechanical balance mechanism in the high-pressure zone ensures constant pressure and automatically replenishes pressure in case of leakage;

[0019] 3. Compact structure: integrates electromagnetic directional valve and proportional relief valve, reducing reliance on external components;

[0020] 4. Energy-saving and efficient: The directional valve is unloaded in the neutral position, reducing ineffective energy consumption. Attached Figure Description

[0021] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0022] Figure 1 This is a schematic diagram of the structure of a pressurization device for a cetane number tester according to the present invention;

[0023] Figure 2 This is a rear view of an embodiment of a pressurization device for a cetane number measuring machine according to the present invention;

[0024] Figure 3 This is a top view of an embodiment of a cetane number measuring machine pressurization device according to the present invention.

[0025] The symbols for the main components are explained as follows: 1. Turbocharger; 2. Fuel outlet; 3. Check valve; 4. Fuel inlet; 5. Hydraulic pump; 6. Proportional relief valve; 7. Solenoid directional valve. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figure 1 As shown, a cetane number tester booster device of this utility model includes a booster 1, a check valve 3, a hydraulic pump 5, and a solenoid directional valve 7. The booster 1 is connected to the check valve 3. The booster 1 has a fuel outlet 2 on its side wall, and the check valve 3 has a fuel inlet 4 at its bottom. The solenoid directional valve 7 is connected to the booster 1 through an oil pipe, and the hydraulic pump 5 is connected to the solenoid directional valve 7 through an oil pipe. The booster 1 has a linked high and low pressure piston. The solenoid directional valve 7 is used to control the flow direction of hydraulic oil to realize the reciprocating motion of the high and low pressure pistons.

[0030] In the practical application of this embodiment, the high and low pressure pistons are linked by a rigid connecting rod, and the ratio of the area of ​​the low pressure piston to the area of ​​the high pressure piston is 10:1.

[0031] In practical applications of this embodiment, a proportional relief valve 6 is also included. The proportional relief valve 6 is connected to the solenoid directional valve 7. The proportional relief valve 6 is used to adjust the output pressure and pressure holding stability.

[0032] In the practical application of this embodiment, the electromagnetic directional valve 7 is a three-position four-way valve with a neutral unloading type, and the switching signal of the electromagnetic directional valve 7 is triggered by the piston displacement.

[0033] In the practical application of this embodiment, the internal high-pressure end of the booster 1 is equipped with a one-way valve, which is used to isolate the oil pipe during the pressure holding stage.

[0034] In the practical application of this embodiment, the maximum output pressure of the hydraulic pump 5 is 19MPa, and the upper limit of the pressure of the hydraulic pump 5 is set by the proportional relief valve 6.

[0035] In the practical application of this embodiment, the check valve 3 is located between the fuel inlet 4 and the turbocharger 1 to prevent fuel backflow.

[0036] In practical applications of this embodiment, a pressure sensor is also included. The pressure sensor is installed on the oil pipe to monitor the oil pipe pressure in real time and feed it back to the proportional relief valve 6.

[0037] This utility model uses a hydraulic pump 5 for driving and an electromagnetic directional valve 7 to control the direction of the oil circuit, thereby realizing the high-frequency reciprocating motion of the piston of the booster 1. High-pressure oil is generated by the high and low pressure piston linkage design area ratio (boost ratio 10:1). The built-in check valve and proportional relief valve 6 realize automatic pressure holding and precise pressure regulation. The electromagnetic directional valve 7 is used for unloading in the middle position to reduce system energy consumption.

[0038] Specifically, it includes the following:

[0039] Phase 1: Boosting Phase

[0040] Hydraulic pump 5 starts and outputs 19MPa hydraulic oil to solenoid directional valve 7. Solenoid directional valve 7 switches to the left position, and hydraulic oil enters the top of the cylinder of intensifier 1, pushing the low-pressure piston down. The low-pressure piston drives the high-pressure piston to compress fuel through the linkage rod. The fuel enters the fuel cylinder through check valve 3, the pressure increases, and high-pressure oil is output. After the piston reaches the bottom, the high-pressure oil pushes the valve core of directional valve 7 to the right, switching the direction of the oil circuit. This cycle repeats automatically, and intensifier 1 can achieve high-frequency operation and continuously output high-pressure oil. When the cylinder is pushed to the bottom, the fuel cylinder quickly rises to the maximum pressure and begins to enter the automatic pressure holding stage.

[0041] Phase 2: Pressure Holding Phase

[0042] High-pressure oil is stabilized by proportional relief valve 6. If the pressure drops, the high and low pressure pistons become unbalanced. The solenoid directional valve 7 automatically reverses, and hydraulic oil enters the bottom of the cylinder, pushing the piston upward to replenish pressure. After the pressure replenishment is completed, the solenoid directional valve 7 resets, and the system enters the pressure holding state.

[0043] Phase 3: Unloading Phase

[0044] After the test, the reversing valve 7 switches to the neutral position; the high-pressure zone of the booster 1 is maintained by the internal check valve, while the low-pressure zone is unloaded and returns to the oil tank, entering the unloading state; after the solenoid reversing valve 7 reverses, the booster 1 receives oil in the reverse direction, and the booster 1 begins to unload. At the same time, the pressure relief rate is adjusted by the proportional relief valve 6 to prevent pressure surges.

[0045] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A pressurization device for a cetane number tester, characterized in that: The device includes a booster (1), a check valve (3), a hydraulic pump (5), and a solenoid directional valve (7). The booster (1) is connected to the check valve (3). The booster (1) has a fuel outlet (2) on its side wall. The check valve (3) has a fuel inlet (4) at its bottom. The solenoid directional valve (7) is connected to the booster (1) via an oil pipe. The hydraulic pump (5) is connected to the solenoid directional valve (7) via an oil pipe. The booster (1) has a linkage high and low pressure piston. The solenoid directional valve (7) is used to control the flow direction of hydraulic oil to realize the reciprocating motion of the high and low pressure piston.

2. The pressurization device for a cetane number tester according to claim 1, characterized in that: The high and low pressure pistons are linked by a rigid connecting rod, and the ratio of the area of ​​the low pressure piston to the area of ​​the high pressure piston is 10:

1.

3. The pressurization device for a cetane number tester according to claim 1, characterized in that: It also includes a proportional relief valve (6), which is connected to a solenoid directional valve (7). The proportional relief valve (6) is used to regulate the output pressure and maintain pressure stability.

4. The pressurization device for a cetane number tester according to claim 1, characterized in that: The electromagnetic directional valve (7) is a three-position four-way valve with a neutral unloading function. The switching signal of the electromagnetic directional valve (7) is triggered by the piston displacement.

5. The pressurization device for a cetane number tester according to claim 1, characterized in that: The internal high-pressure end of the booster (1) is equipped with a one-way valve, which is used to isolate the oil pipe during the pressure holding stage.

6. The pressurization device for a cetane number tester according to claim 1, characterized in that: The maximum output pressure of the hydraulic pump (5) is 19MPa, and the upper limit of the pressure of the hydraulic pump (5) is set by the proportional relief valve (6).

7. The pressurization device for a cetane number tester according to claim 1, characterized in that: The check valve (3) is located between the fuel inlet (4) and the turbocharger (1) to prevent fuel backflow.

8. The pressurization device for a cetane number tester according to claim 1, characterized in that: It also includes a pressure sensor, which is installed on the oil pipe to monitor the oil pipe pressure in real time and feed it back to the proportional relief valve (6).

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