A hydraulic oil tank for a hydraulic oil pump

Abstract

This utility model discloses a hydraulic oil tank for a hydraulic oil pump. The tank body has cross-sections formed at a set of diagonal sides, one of which has an oil suction port and the other has an oil return port. The oil suction port's pipe extends into the tank body and connects to a coarse filter. The coarse filter is connected to a funnel-shaped expansion suction head via a threaded connector. The oil return port's outlet is connected to a fine filter, which is connected to a one-way throttle valve. The one-way throttle valve is connected to a flow-regulating pipe, which is curved and located within the tank body. This invention adds a funnel-shaped expansion suction head at the oil suction port to reduce suction resistance and minimize inlet disturbance. The addition of a flow-regulating pipe at the oil return port slows down the return oil flow. Combined with the 45° oblique cut, this effectively disperses the impact force of the oil and reduces disturbance. Furthermore, the diagonal distribution of the oil suction and return ports extends the oil flow path, promoting impurity sedimentation and air separation.

Description

Technical Field

[0001] This utility model relates to hydraulic oil tanks, and more particularly to a hydraulic oil tank for a hydraulic oil pump. Background Technology

[0002] In hydraulic systems, hydraulic tanks provide a sufficient oil supply to the hydraulic pump and handle the heat, impurities, and air generated during pump operation to ensure the oil meets the pump's operating requirements. Currently, hydraulic tanks are generally designed with a volume 3-7 times the pump's flow rate. A coarse filter is installed at the suction port and is always submerged in the oil to prevent cavitation. The return port is cut at a 45° angle towards the tank wall to reduce oil impact. However, these hydraulic tanks still have the following technical drawbacks: First, the diameter of the suction pipe is usually calculated based on the pump flow rate to avoid insufficient diameter leading to suction difficulties. However, the front end of the suction pipe is usually connected to a coarse filter. The limited opening of the coarse filter immersed in the oil increases suction resistance, causing disturbances and increasing noise. Second, although the return port uses a 45° angle to reduce impact, the return oil flow rate is relatively fast, and relying solely on the angled outlet to alleviate impact is not ideal, still resulting in significant noise interference. Utility Model Content

[0003] To address the shortcomings of the aforementioned technologies, this utility model provides a hydraulic oil tank for a hydraulic oil pump.

[0004] To solve the above technical problems, the technical solution adopted by this utility model is: a hydraulic oil tank for a hydraulic oil pump, including an oil tank body, and a cross-section is formed at a set of diagonal side positions of the oil tank body, wherein an oil suction port is provided on one cross-section surface and an oil return port is provided on the other cross-section surface;

[0005] A partition is welded and fixed between the other set of diagonal sides of the fuel tank body. The bottom of the partition is provided with a flow port, and a metal filter screen is installed at the flow port.

[0006] The oil suction port extends into the oil tank and connects to the outlet of the coarse filter. The inlet of the coarse filter is connected to a funnel-shaped expansion suction head via a threaded connector.

[0007] The outlet of the oil return port is connected to a fine filter, the outlet of the fine filter is connected to a one-way throttle valve, and the outlet of the one-way throttle valve is connected to a flow-slowing pipe, which is curved and located inside the oil tank.

[0008] Preferably, the inner cavity of the oil tank body is divided into an oil inlet area and an oil return area by the partition. The oil suction port is connected to the oil inlet area, the oil inlet area and the oil return area are connected through a flow port, and the oil return area is connected to the oil return port.

[0009] Preferably, the slow-flow pipe is located in the oil return zone, and the liquid outlet end of the slow-flow pipe is cut at a 45° angle and faces the baffle.

[0010] Preferably, the slow-flow pipe has two-stage buffer bending zones, namely a primary buffer bending zone and a secondary buffer bending zone.

[0011] Preferably, the primary buffer bend and the secondary buffer bend form a 30-degree angle with their tangents.

[0012] Preferably, the two ends of the partition are set as edges.

[0013] Preferably, the top opening of the fuel tank body is sealed with a top cover.

[0014] Preferably, a flange edge is formed around the top opening of the oil tank body, and a sealing gasket is installed in the groove of the flange edge. The sealing gasket is clamped between the top cover and the flange edge, and the top cover and the flange edge are locked together by evenly distributed bolts and nuts.

[0015] Preferably, a breather valve is provided on the top cover, a level gauge connected to the inner cavity of the oil tank body 1 is installed on one side, and an oil return area is also connected to an oil drain valve.

[0016] This utility model discloses a hydraulic oil tank for a hydraulic oil pump. A trumpet-shaped expansion suction head is added to the oil inlet to reduce suction resistance and inlet disturbance, thereby reducing noise. A flow-damping pipe with two-stage buffer bends is added to the oil return port to slow down the oil entering the return zone. Combined with a 45° bevel, this effectively disperses the impact force of the oil, reducing disturbance and further reducing noise. Furthermore, the oil inlet and return port are diagonally distributed, extending the oil flow path to promote impurity sedimentation and air separation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of the relevant structural settings of the central oil suction port.

[0019] Figure 3 for Figure 1 A schematic diagram of the relevant structural settings of the medium-slow flow tube.

[0020] Figure 4 for Figure 3 Schematic diagram of a medium-slow flow tube.

[0021] Figure 5 for Figure 1 Schematic diagram of the structure of the partition.

[0022] In the diagram: 1. Oil tank body; 1a. Cross-section; 2. Flange edge; 3. Flow control pipe; 31. Primary buffer bend; 32. Secondary buffer bend; 4. Oil suction port; 5. Level gauge; 6. Baffle plate; 61. Edge; 62. Metal filter screen; 7. Sealing gasket; 8. Top cover; 9. Breather valve; 10. Bolt; 11. Coarse filter; 12. Threaded joint; 13. Expanding suction head; 14. Oil return port; 15. Fine filter; 16. One-way throttle valve. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] This embodiment discloses a hydraulic oil tank for a hydraulic oil pump, the overall structure of which is as follows: Figure 1 As shown, its basic structure is the oil tank body 1, which provides a space for storing hydraulic oil, dissipating oil heat, settling impurities in the oil, and escaping gas from the oil for the hydraulic oil pump.

[0026] First, a set of diagonal sides of the oil tank body 1 are cut to form a vertical cut surface 1a. An oil suction port 4 is set on the surface of one cut surface and an oil return port 14 is set on the surface of the other cut surface, so that the oil suction port and the oil return port are diagonally distributed. The diagonally distributed oil suction port and oil return port can extend the oil flow to a certain extent, which helps the sedimentation of impurities in the oil and the separation of oil and air.

[0027] Secondly, a partition 6 is welded and fixed between the other set of diagonal sides of the fuel tank body 1, such as... Figure 5 As shown, the two ends of the partition 6 are designed with sharp edges 61 to fit the diagonal features of the oil tank body 1, enabling a close-fitting weld. A flow port is provided at the bottom of the partition 6, and a metal filter screen 62 is installed at the flow port. Thus, the oil suction port 4 connects to the oil inlet area, the flow port connects the oil inlet area to the oil return area, and the oil return area connects to the oil return port 14. In this way, the hydraulic oil returning from the hydraulic pump enters the oil return area through the oil return port, is further filtered by the metal filter screen 62, and then enters the oil suction area, before being sent back into the hydraulic pump for operation.

[0028] Furthermore, considering the drawbacks of existing hydraulic oil tanks, which have large disturbances during oil return and suction, resulting in high vibration and noise, further improvements are made to the relevant structural settings of the suction port 4 and the return port 14.

[0029] The oil suction port 4 is connected to the hydraulic oil pump via relevant pipelines. During the oil suction process of the hydraulic oil pump, the hydraulic oil in the oil tank 1 is sent to the hydraulic oil pump through the oil suction port 4. A coarse oil filter (filtration accuracy 80-180μm, such as a mesh filter) is usually installed at the oil suction port 4 to prevent large particles of impurities from entering the hydraulic oil pump. The pipeline from the oil suction port 4 extends into the oil tank 1 and connects to the outlet end of the coarse filter 11. The connection between the oil suction port 4 and the coarse filter 11 is sealed using an oil-resistant sealing ring or other structures. The vertically installed coarse filter 11 is immersed in the oil.

[0030] like Figure 2 As shown, the inlet end of the coarse filter 11 is connected to a funnel-shaped expansion suction head 13 via a threaded joint. The connection between the expansion suction head 13 and the coarse filter 11 is also sealed using an oil-resistant sealing ring and other structures. As the contact area between the expansion suction head and the oil increases, the oil suction resistance can be reduced, the disturbance at the inlet can be reduced, and the noise reduction effect can be achieved.

[0031] The oil return port 14 has been improved with a slow flow design to reduce the impact force by reducing the flow rate of the oil returning to the return zone.

[0032] Specific settings include: such as Figure 3 As shown, the return oil port 14 is connected to the return oil of the hydraulic oil pump, and a fine filter 15, a one-way throttle valve 16 and a slow-flow pipe 3 are sequentially connected to the outlet end of the return oil port 14.

[0033] Among them, the fine filter 15 (filtration accuracy 10-25μm, such as paper filter cartridge filter, metal sintered filter) is used to finely filter the returned oil, intercept small impurities, and ensure the cleanliness of the oil.

[0034] A one-way throttle valve 16 is added to the outlet end of the fine filter 15. Under the action of the one-way throttle valve 16, the return oil flow rate can be controlled to avoid high-speed oil directly impacting the inside of the oil tank.

[0035] The outlet end of the one-way throttle valve 16 is connected to a flow-regulating pipe 3, which is curved and located inside the oil tank body 1. Figure 4 As shown, the slow-flow pipe 3 has two-stage buffer bends, namely the primary buffer bend 3 and the secondary buffer bend 32. The buffer bends receive the return oil from the one-way throttle valve 16 in the form of a gentle slope. Preferably, the primary buffer bend 31 and the secondary buffer bend 32 form a 30-degree angle with their tangents. Thus, compared with the direct drop, the flow rate of the return oil can be further reduced under the slow-flow effect of the gentle slope.

[0036] Finally, with the slow-flow pipe 3 cut at a 45° angle and facing the liquid outlet end of the baffle 6, the impact of the oil is further reduced, thereby optimizing the oil backflow disturbance and further reducing noise.

[0037] Furthermore, it should be noted that, to support the basic functions of the hydraulic oil tank in this embodiment, a drain valve is installed on one side of the bottom of the return oil area, and the bottom plate of the return oil area is tilted downwards (1-3°) towards the drain valve to facilitate the cleaning of impurities and the discharge of oil. A level gauge 5 is installed on the side wall of the oil tank body 1 for monitoring the oil level. A breather valve 9 with a filter function is installed on the top of the oil tank body 1, and the ventilation volume must meet the system's oil volume change requirements to achieve venting.

[0038] Therefore, the hydraulic oil tank for the hydraulic oil pump disclosed in this embodiment has the following technical advantages compared with the prior art:

[0039] 1) The front end of the oil suction port is connected to a funnel-shaped expansion suction head. The expansion suction head is immersed in the oil, which can increase the contact area between the oil suction port and the oil, thereby reducing the oil suction resistance, reducing disturbance at the inlet, and achieving the purpose of reducing noise.

[0040] 2) A flow-slowing pipe is installed at the end of the return oil port. The flow-slowing pipe has two-stage buffer bends. The gradual slope structure further reduces the oil velocity that finally flows into the return oil zone, thereby reducing the impact force of the oil and further reducing noise.

[0041] 3) The tank body is designed with a cross-section structure for the diagonal distribution of the oil inlet and outlet. Compared with a square tank of the same volume, the diagonal distribution of the oil inlet and outlet can extend the oil flow, prevent the return oil from being directly sucked into the pump and forming a "short circuit", and promote the sedimentation of impurities and air separation in the oil, thereby optimizing the performance of the tank.

[0042] Example 2

[0043] This embodiment discloses a hydraulic oil tank for a hydraulic oil pump. Based on the structure disclosed in Embodiment 1, an upper cover 8 is sealed at the top opening of the tank body 1. The upper cover is designed to be removable, which facilitates internal maintenance of the tank body 1.

[0044] like Figure 1 As shown, the installation of the upper cover 8 specifically includes: a flange edge 2 is formed around the top opening of the oil tank body 1; a sealing gasket 7 is installed in the groove on the end face of the flange edge 2; the sealing gasket 7 is clamped between the upper cover 8 and the flange edge 2; and the upper cover 8 and the flange edge 2 are locked together by evenly distributed bolts and nuts. Thus, the sealing is achieved by the compression deformation of the sealing gasket 7.

[0045] Correspondingly, a breather valve 9 is installed on the upper cover 8. A level gauge 5 communicating with the inner cavity of the oil tank body 1 is installed on one side to facilitate the measurement of the oil level.

[0046] Therefore, it can be seen that the hydraulic oil tank for the hydraulic oil pump disclosed in this embodiment adopts a detachable top cover design, which facilitates the internal maintenance operation of the oil tank body 1.

[0047] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A hydraulic oil tank for a hydraulic oil pump, comprising a tank body (1), characterized in that: The oil tank body (1) has a set of diagonal side surfaces (1a) respectively, wherein one side surface is provided with an oil suction port (4) and the other side surface is provided with an oil return port (14). A partition (6) is welded and fixed between the other set of diagonal sides of the oil tank body (1). The bottom of the partition (6) is provided with a flow port, and a metal filter screen (62) is installed at the flow port. The pipeline of the oil suction port (4) extends into the oil tank body (1) and is connected to the liquid outlet of the coarse filter (11). The liquid inlet of the coarse filter (11) is connected to a funnel-shaped expansion oil suction head (13) through a threaded joint. The outlet of the return port (14) is connected to a fine filter (15), the outlet of the fine filter (15) is connected to a one-way throttle valve (16), the outlet of the one-way throttle valve (16) is connected to a slow-flow pipe (3), the slow-flow pipe (3) is curved and located inside the oil tank body (1).

2. The hydraulic oil tank for a hydraulic oil pump according to claim 1, characterized in that: The inner cavity of the oil tank body (1) is divided into an oil inlet area and an oil return area by the partition (6). The oil suction port (4) is connected to the oil inlet area. The oil inlet area and the oil return area are connected through a flow port. The oil return area is connected to the oil return port (14).

3. The hydraulic oil tank for a hydraulic oil pump according to claim 2, characterized in that: The slow-flow pipe (3) is located in the oil return zone, and the liquid outlet end of the slow-flow pipe (3) is cut at 45° and faces the partition (6).

4. The hydraulic oil tank for a hydraulic oil pump according to claim 3, characterized in that: The slow-flow pipe (3) has two-stage buffer bends, namely a first-stage buffer bend (31) and a second-stage buffer bend (32).

5. The hydraulic oil tank for a hydraulic oil pump according to claim 4, characterized in that: The primary buffer bend (31) and the secondary buffer bend (32) form a 30-degree angle with their tangents.

6. The hydraulic oil tank for a hydraulic oil pump according to claim 5, characterized in that: The two ends of the partition (6) are set as edges (61).

7. The hydraulic oil tank for a hydraulic oil pump according to claim 2 or 6, characterized in that: The top opening of the oil tank body (1) is sealed with a top cover (8).

8. The hydraulic oil tank for a hydraulic oil pump according to claim 7, characterized in that: The top opening of the oil tank body (1) is surrounded by a flange edge (2), and a sealing gasket (7) is installed in the groove of the flange edge (2). The sealing gasket (7) is clamped between the upper cover (8) and the flange edge (2), and the upper cover (8) and the flange edge (2) are locked together by evenly distributed bolts (10) and nuts.

9. The hydraulic oil tank for a hydraulic oil pump according to claim 7, characterized in that: A breather valve (9) is provided on the top cover (8), a level gauge (5) connected to the inner cavity is installed on one side of the oil tank body (1), and an oil return zone is also connected to an oil drain valve.

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