Engine load test hydraulic system

Abstract

The utility model discloses an engine load test hydraulic system which comprises a hydraulic shell, an oil tank is erected on the side face of the hydraulic shell, a first hydraulic pipe is fixedly connected to the side face of the hydraulic shell in a penetrating mode, an overflow valve is fixedly connected to the side face of the first hydraulic pipe in a penetrating mode, and an outer connector is fixedly connected to the side face of the hydraulic shell in a penetrating mode. Symmetrical bases are fixedly connected to the lower end of the hydraulic shell, a rotating shaft is movably connected into the hydraulic shell in a penetrating mode, a plurality of fan blades are fixedly connected to the rotating shaft, a limiting shaft is fixedly connected into the overflow valve, a pressure spring is arranged on the limiting shaft in a sleeving mode, and a flow dividing pipe is fixedly connected to the side face of the overflow valve in a penetrating mode. A threaded groove is formed in the outer connector. Through the structure, pressure is accurately controlled to be stable, system overload damage is effectively prevented, hydraulic oil leakage is prevented, stable connection is ensured, and the test accuracy and the system stability are prevented from being affected by connection looseness in the test process.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic testing systems, and in particular to a hydraulic system for testing engine load. Background Technology

[0002] In the research and development and production of engines, load testing is a crucial step in evaluating their performance, reliability, and durability. Traditional engine load testing often employs mechanical or eddy current loading methods, which suffer from low loading accuracy, slow response speed, and difficulty in simulating complex operating conditions.

[0003] While some hydraulic systems used in load testing, such as the technical solution disclosed in CN214945443U, have improved the loading method to some extent, they still have shortcomings. In actual testing, the hydraulic system in this patent still faces significant pressure fluctuations, resulting in poor stability of the test data. Furthermore, its maintenance is difficult, and the replacement of key components is inconvenient, making it difficult to meet the high-precision, multi-condition, and high-efficiency testing requirements of modern engines. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic system for engine load testing, which can accurately control pressure and stabilize the system, effectively prevent system overload damage, prevent hydraulic oil leakage, ensure a firm connection, and avoid affecting test accuracy and system stability due to loose connections during the test.

[0005] To achieve the above objectives, an engine load testing hydraulic system is provided, including a hydraulic housing, an oil tank mounted on the side of the hydraulic housing, a first hydraulic pipe fixedly connected through the side of the hydraulic housing, an overflow valve fixedly connected through the side of the first hydraulic pipe, an external interface fixedly connected through the side of the hydraulic housing, and symmetrical bases fixedly connected to the lower end of the hydraulic housing.

[0006] According to the aforementioned engine load test hydraulic system, a rotating shaft is movably connected through the hydraulic housing, and multiple fan blades are fixedly connected to the rotating shaft. A motor is fixedly connected to the side of the hydraulic housing, and the motor is movably connected to the rotating shaft.

[0007] According to the aforementioned engine load test hydraulic system, a limiting shaft is fixedly connected inside the overflow valve, a pressure spring is sleeved on the limiting shaft, an oil pressure plate is sleeved on the limiting shaft, and one end of the pressure spring is movably connected to the oil pressure plate.

[0008] According to the aforementioned engine load test hydraulic system, a diverter pipe is fixedly connected through the side of the relief valve, and one end of the diverter pipe is fixedly connected through the oil tank.

[0009] According to the aforementioned engine load test hydraulic system, a second hydraulic pipe is fixedly connected through the upper end of the first hydraulic pipe, and a pressure gauge is fixedly connected through the upper end of the second hydraulic pipe, with a pointer movably connected inside the pressure gauge.

[0010] According to the engine load test hydraulic system, an oil pipe is fixedly connected to the side of the second hydraulic pipe, and the other end of the oil pipe is fixedly connected to the oil tank.

[0011] According to the aforementioned engine load test hydraulic system, the external interface is provided with a threaded groove, a rotating threaded sleeve is movably connected to the threaded groove, a first sealing ring is movably connected to the side of the rotating threaded sleeve, and the other side of the first sealing ring is movably connected to the hydraulic housing.

[0012] According to the aforementioned engine load test hydraulic system, a second sealing ring is movably connected inside the rotating threaded sleeve, and the other side of the second sealing ring is movably connected to one end of the external interface. One end of the rotating threaded sleeve is fitted with a movably connected external pipe, and a tightening ring is fitted on the external pipe.

[0013] Beneficial effects:

[0014] 1. The system's overflow valve is equipped with a pressure spring and an oil pressure plate. When the hydraulic system pressure is too high, the oil pressure plate compresses the spring to open the overflow valve, and the excess hydraulic oil flows back to the oil tank through the diverter pipe. With the help of a pressure gauge to monitor the pressure in real time, the pressure can be accurately controlled and stabilized, effectively preventing system overload damage.

[0015] 2. The external interface is connected to the external pipe through a threaded groove and a rotating threaded sleeve. With the first and second sealing rings, a double seal is achieved to prevent hydraulic oil leakage. The tightening ring further reinforces the external pipe to ensure a stable connection and avoid the impact of loose connection on test accuracy and system stability during the test.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a perspective view of the hydraulic system for engine load testing proposed in this utility model;

[0019] Figure 2 This is a half-sectional view of the hydraulic system for engine load testing proposed in this utility model;

[0020] Figure 3 This is a cross-sectional view of the hydraulic housing of the engine load testing hydraulic system proposed in this utility model;

[0021] Figure 4 The present utility model proposes Figure 3 Enlarged view of point A in the middle.

[0022] Legend:

[0023] 1. Hydraulic housing; 2. First hydraulic pipe; 3. Relief valve; 4. Second hydraulic pipe; 5. Oil tank; 6. Pressure gauge; 7. Motor; 8. Rotary threaded sleeve; 9. External pipe; 10. Base; 11. Diverter pipe; 12. Pointer; 13. Oil pipe; 14. Limiting shaft; 15. Oil cap plate; 16. Pressure spring; 17. Rotating shaft; 18. Fan blade; 19. Threaded groove; 20. First sealing ring; 21. Second sealing ring; 22. Tightening ring; 23. External interface. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] Reference Figure 1-4 The hydraulic system for engine load testing according to this utility model includes a hydraulic housing 1, an oil tank 5 mounted on the side of the hydraulic housing 1, a first hydraulic pipe 2 fixedly connected through the side of the hydraulic housing 1, an overflow valve 3 fixedly connected through the side of the first hydraulic pipe 2, an external interface 23 fixedly connected through the side of the hydraulic housing 1, and a symmetrical base 10 fixedly connected to the lower end of the hydraulic housing 1 to ensure the system is placed stably.

[0026] Specifically: A rotating shaft 17 is movably connected through the hydraulic housing 1, and multiple fan blades 18 are fixedly connected to the rotating shaft 17. A motor 7 is fixedly connected to the side of the hydraulic housing 1, and the motor 7 is movably connected to the rotating shaft 17.

[0027] Specifically: The overflow valve 3 is fixedly connected to a limit shaft 14, a pressure spring 16 is sleeved on the limit shaft 14, an oil top plate 15 is sleeved on the limit shaft 14, and one end of the pressure spring 16 is movably connected to the oil top plate 15 to realize oil circulation and pressure release.

[0028] Specifically: A diversion pipe 11 is fixedly connected through the side of the overflow valve 3. One end of the diversion pipe 11 is fixedly connected through the oil tank 5. Excess oil flows back to the oil tank 5 through the diversion pipe 11.

[0029] Specifically: A second hydraulic pipe 4 is fixedly connected through the upper end of the first hydraulic pipe 2, and a pressure gauge 6 is fixedly connected through the upper end of the second hydraulic pipe 4. A pointer 12 is movably connected inside the pressure gauge 6.

[0030] Specifically: the side of the second hydraulic pipe 4 is fixedly connected to an oil pipe 13, and the other end of the oil pipe 13 is fixedly connected to the oil tank 5.

[0031] Specifically: The external interface 23 has a threaded groove 19, a rotating threaded sleeve 8 is movably connected to the threaded groove 19, a first sealing ring 20 is movably connected to the side of the rotating threaded sleeve 8, and the other side of the first sealing ring 20 is movably connected to the hydraulic housing 1.

[0032] Specifically: a second sealing ring 21 is movably connected inside the rotating threaded sleeve 8, and the other side of the second sealing ring 21 is movably connected to one end of the outer interface 23. One end of the rotating threaded sleeve 8 is fitted with a movably connected outer pipe 9, and a tightening ring 22 is fitted on the outer pipe 9 to form a double seal.

[0033] Working principle:

[0034] The external interface 23 on the side of the hydraulic housing 1 is tightly connected to the external pipe 9 via a rotating threaded sleeve 8, a first sealing ring 20, and a second sealing ring 21, forming a double-sealing structure to ensure stable and leak-free hydraulic system oil circuit connections. The external pipe 9 connects to external equipment, providing a hydraulic power transmission channel for engine load testing. The first hydraulic pipe 2 serves as the main oil circuit, delivering hydraulic oil from the oil tank 5 to the test system. When the oil circuit pressure exceeds the set value, the oil top plate 15 in the overflow valve 3 compresses the pressure spring 16 under pressure, opening the overflow channel. Excess oil flows back to the oil tank 5 through the diverter pipe 11, achieving pressure release and oil circulation, ensuring stable system pressure. The first hydraulic pipe 2 is connected to the pressure gauge 6 via the second hydraulic pipe 4. The pointer 12 in the pressure gauge 6 displays the hydraulic system pressure in real time, facilitating operator monitoring of system operation. The oil pipe 13 connected to the side of the second hydraulic pipe 4 returns some oil to the oil tank 5, further regulating system pressure and flow. The symmetrically arranged base 10 stably supports the hydraulic housing 1, ensuring the stability of the entire hydraulic system during testing.

[0035] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An engine load testing hydraulic system, including a hydraulic housing (1), characterized in that: An oil tank (5) is mounted on the side of the hydraulic housing (1). A first hydraulic pipe (2) is fixedly connected through the side of the hydraulic housing (1). An overflow valve (3) is fixedly connected through the side of the first hydraulic pipe (2). An external interface (23) is fixedly connected through the side of the hydraulic housing (1). A symmetrical base (10) is fixedly connected to the lower end of the hydraulic housing (1).

2. The hydraulic system for engine load testing according to claim 1, characterized in that, A rotating shaft (17) is movably connected through the hydraulic housing (1). Multiple fan blades (18) are fixedly connected to the rotating shaft (17). A motor (7) is fixedly connected to the side of the hydraulic housing (1). The motor (7) is movably connected to the rotating shaft (17).

3. The hydraulic system for engine load testing according to claim 1, characterized in that, The overflow valve (3) is fixedly connected to a limiting shaft (14), a pressure spring (16) is sleeved on the limiting shaft (14), an oil top plate (15) is sleeved on the limiting shaft (14), and one end of the pressure spring (16) is movably connected to the oil top plate (15).

4. The hydraulic system for engine load testing according to claim 3, characterized in that, A diversion pipe (11) is fixedly connected through the side of the overflow valve (3), and one end of the diversion pipe (11) is fixedly connected through the oil tank (5).

5. The hydraulic system for engine load testing according to claim 1, characterized in that, The upper end of the first hydraulic pipe (2) is fixedly connected to a second hydraulic pipe (4), and the upper end of the second hydraulic pipe (4) is fixedly connected to a pressure gauge (6), and a pointer (12) is movably connected inside the pressure gauge (6).

6. The hydraulic system for engine load testing according to claim 5, characterized in that, The second hydraulic pipe (4) is fixedly connected to an oil pipe (13) through its side, and the other end of the oil pipe (13) is fixedly connected to the oil tank (5).

7. The hydraulic system for engine load testing according to claim 1, characterized in that, The external interface (23) is provided with a threaded groove (19), and a rotating threaded sleeve (8) is movably connected to the threaded groove (19). A first sealing ring (20) is movably connected to the side of the rotating threaded sleeve (8), and the other side of the first sealing ring (20) is movably connected to the hydraulic housing (1).

8. The hydraulic system for engine load testing according to claim 7, characterized in that, The rotating threaded sleeve (8) is movably connected to a second sealing ring (21), and the other side of the second sealing ring (21) is movably connected to one end of the outer interface (23). One end of the rotating threaded sleeve (8) is fitted with a movably connected outer tube (9), and a tightening ring (22) is fitted on the outer tube (9).

Images