Steering engine hydraulic station for ship

Abstract

The utility model discloses a steering engine hydraulic station for a ship, which relates to the technical field of hydraulic pressure, and comprises a cabinet body, a motor, an oil pump, an oil tank and an air filter, a vertical cylinder is connected to the upper surface of a top shell plate of the oil tank and inserted into a mounting hole of the mounting plate. The bottom end of the first mounting cylinder is detachably connected with the vertical cylinder, and the top end is detachably connected with the housing; the housing sleeves the periphery of the first mounting cylinder; an air inlet gap is longitudinally formed in the housing; the filter screen is inserted into the vertical cylinder and is detachably connected with the vertical cylinder; filter strips are arranged in the middle of an inner cavity of the air inlet gap; a ball sealer and an inner bulge are arranged at the bottom end of the inner cavity of the air inlet gap, and the ball sealer is pressed on the inner bulge; the top end of the air filter is provided with a one-way valve. When the oil pump works, outside air flows upwards in the air inlet gap, heavy impurity particles cannot move upwards and enter the oil tank through the air filter, the pollution problem of hydraulic oil is relieved, abrasion of the oil pump is reduced, and the service life of the oil pump is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, specifically to a hydraulic station for a ship's steering gear. Background Technology

[0002] Marine steering gear is a core component of a ship's steering system. It controls the ship's direction of travel by rotating the rudder blades. Marine steering gears are generally classified into steam steering gears, electric steering gears, and electro-hydraulic steering gears.

[0003] Electro-hydraulic steering gear typically includes a hydraulic cylinder and a hydraulic power unit, which usually houses an oil tank. The oil tank typically has an opening to balance the internal and external air pressure during the outflow and return of hydraulic oil, preventing problems such as tank deformation under pressure and pump cavitation. An air filter needs to be installed at the opening to prevent impurities from the outside air from entering the hydraulic oil, thereby avoiding accelerated wear on the pump and hydraulic cylinder.

[0004] Traditional air filters use a cylindrical filter element structure, which requires a large amount of filter media (e.g., volume). Furthermore, the harsh operating environment of ships accelerates the aging of the filter element. As the filter element ages, debris falls into the oil tank, contaminating the hydraulic oil and accelerating the wear of the hydraulic cylinders and pumps. Since filter element aging is difficult to observe with the naked eye, operators struggle to detect it in time, further exacerbating the wear of the hydraulic cylinders and pumps. Summary of the Invention

[0005] In order to overcome the problem in the above-mentioned background technology that "traditional air filters for hydraulic cylinders require a large amount of filter media, and the debris generated after the filter element ages will fall into the oil tank", this utility model provides a hydraulic station for ship steering gear.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is:

[0007] A hydraulic station for a ship's steering gear includes a cabinet, a motor, an oil pump, and an oil tank. The cabinet has a mounting plate on its top. The motor and the oil pump are connected to the top and bottom sides of the mounting plate, respectively. The oil tank is located within the cabinet's internal cavity. The oil pump is connected to an oil extraction pipe and an oil delivery pipe. The station also includes an air filter communicating with the oil tank. The air filter includes a first mounting cylinder, a filter screen, and a cover. A vertical cylinder is connected to the upper surface of the top cover of the oil tank and inserted into a mounting hole in the mounting plate. The bottom end of the first mounting cylinder is detachably connected to the vertical cylinder, and its top end is detachably connected to the cover. The cover is fitted around the outer periphery of the first mounting cylinder. A longitudinally arranged air intake gap is provided inside the cover. The filter screen is inserted into the vertical cylinder and is detachably connected. A filter strip is provided in the middle of the air intake gap's inner cavity. A sealing ball and an inner protrusion are provided at the bottom end of the air intake gap's inner cavity, with the sealing ball pressing against the inner protrusion. A one-way valve is installed at the top of the air filter.

[0008] As a further optimization of this utility model, the cover includes a detachably connected inner cylinder and an outer cylinder, and the air inlet gap is disposed between the inner cylinder and the outer cylinder; the inner cylinder has a top-opening structure, and the top of the outer cylinder is provided with a sealing plate.

[0009] As a further optimization of this utility model, the outer wall of the inner cylinder is provided with a plurality of longitudinally arranged support fins, which are arranged in a circumferential array along the outer wall of the inner cylinder; the air inlet gap is provided between adjacent support fins; the sealing plate is pressed against the top surface of the inner cylinder; the top of the inner cylinder side wall is provided with a vent hole, and the two ends of the vent hole are respectively connected to the air inlet gap and the inner cavity of the inner cylinder.

[0010] As a further optimization of this utility model, the top of the inner wall of the inner cylinder is provided with an inner extension fin, and the vent hole penetrates the inner extension fin; the inner extension fin is pressed against the top surface of the first mounting cylinder.

[0011] As a further optimization of this utility model, the top of the inner sidewall of the first mounting cylinder is provided with an inner extension ring, and the top surface of the inner extension ring is provided with an inner extension ring groove.

[0012] As a further optimization of this utility model, the top end of the inner annular groove is lower than the bottom surface of the sealing plate and higher than the top surface of the first mounting cylinder.

[0013] As a further optimization of this utility model, the first mounting sleeve is sleeved on the outer periphery of the vertical cylinder.

[0014] As a further optimization of this utility model, the filter screen includes a screen body and a limiting ring installed at the top edge of the screen body, with the bottom surface of the limiting ring pressed against the top surface of the vertical cylinder.

[0015] As a further optimization of this utility model, the inner wall of the first mounting cylinder is provided with an inner extension protrusion, and the bottom surface of the inner extension protrusion is pressed at the top surface of the limiting ring.

[0016] As a further optimization of this utility model, an installation plate is sleeved on the outer wall of the vertical cylinder, the vertical cylinder and the installation plate are detachably connected, the installation plate and the top shell plate are respectively located on the upper and lower surfaces of the installation plate; the installation plate and the installation plate are sealed and fixedly connected.

[0017] In summary, this utility model has at least one of the following advantages:

[0018] (1) Debris generated after filter bar aging: Debris generated at the top of the filter bar accumulates on the top surface of the filter bar; debris generated in the middle of the filter bar is clamped and limited in the middle position; debris generated at the bottom of the filter bar falls downwards, and some of the debris leaks directly through the bottom of the air inlet gap. During the up-and-down movement of the sealing ball, it will continuously knock on the remaining debris and crush it. The crushed debris leaks out through the bottom of the air inlet gap. This patent can prevent debris from falling into the oil tank, thereby avoiding the problem of hydraulic oil contamination.

[0019] (2) When the outside air flows upward in the air intake gap, the heavier impurity particles (such as dust) cannot move upward and enter the oil tank through the air filter, so as to reduce the contamination problem of hydraulic oil, thereby reducing the wear of the oil pump and improving the service life of the oil pump.

[0020] (3) During the process of outside air flowing into the inner cavity of the first mounting cylinder from the top of the air intake gap, the gas in the outside air is in a horizontal flow state and the impurity particles in the outside air are in a downward oblique state (affected by their own weight). Some impurity particles will fall into the inner ring groove, thereby reducing the amount of impurity particles entering the oil tank and mitigating the problem of hydraulic oil contamination.

[0021] (4) The filter screen is used to block impurity particles in the outside air, thereby reducing the amount of impurity particles entering the oil tank and mitigating the problem of hydraulic oil contamination. Attached Figure Description

[0022] The present application will be further explained below with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the cabinet;

[0025] Figure 3 Diagram showing the installation location of the air filter;

[0026] Figure 4This is a sectional view of the air filter structure.

[0027] Figure 5 This is a schematic diagram of the top view of the cross section of the casing;

[0028] Figure 6 A schematic diagram showing the position and structure of the supporting fins;

[0029] Figure 7 This is a schematic diagram of the vertical section of the inner extension annular groove location and structure;

[0030] Figure 8 This is a schematic diagram of the filter structure;

[0031] Figure 9 This is a schematic diagram showing the state of the filter screen with the inner extension protrusion pressed together;

[0032] Figure 10 This is a schematic diagram showing the installation location of the rudder blade;

[0033] Figure 11 This is a schematic diagram of the rotating assembly structure;

[0034] Figure 12 This is a schematic diagram showing the position and structure of the blocking ball and the inner protrusion;

[0035] Figure 13 This is a schematic diagram showing the position and structure of the sealing ball and the first protrusion.

[0036] Explanation of reference numerals in the attached figures:

[0037] In the picture,

[0038] 1. Cabinet body; 11. Mounting plate;

[0039] 2. Electric motor;

[0040] 3. Oil pump;

[0041] 4. Fuel tank; 41. Top shell plate; 42. Vertical cylinder; 43. Mounting plate;

[0042] 5. Oil extraction pipe;

[0043] 6. Oil pipeline;

[0044] 7. Air filter; 71. First mounting cylinder; 711. Inner extended ring body; 7111. Inner extended ring groove; 712. Inner extended protrusion; 72. Filter screen; 721. Mesh body; 722. Limiting ring; 73. Cover; 730. Air inlet gap; 731. Inner cylinder; 7311. Support fins; 73111. Sealing ball; 73112. Inner protrusion; 73113. Filter strip; 73114. Locking protrusion; 7312. Inner extended fins; 7313. Vent hole; 732. Outer cylinder; 7321. Sealing plate; 74. One-way valve; 741. Straight cylinder section; 742. Sealing ball; 743. First protrusion; 744. Bent cylinder section;

[0045] 8. Hull; 81. Base plate;

[0046] 9. Servo motor; 91. Steering wheel; 92. Rudder blade; 93. Drive shaft; 94. Rotating assembly; 941. Hydraulic cylinder; 942. Rotating column; 943. Extension arm; 944. Drive column. Detailed Implementation

[0047] Based on the above-described structural features of this application, the implementation methods of this application will be further described as follows:

[0048] Reference Figures 1-3 This embodiment provides a hydraulic station for a ship's steering gear, including a cabinet 1, a motor 2, an oil pump 3, and an oil tank 4; the top of the cabinet 1 is provided with a mounting plate 11, and the side plates of the cabinet 1 are fixedly connected to the mounting plate 11 (for example, by an integral fixed connection or by bolts), and the bottom plate of the cabinet 1 is fixedly connected to the side plates (for example, by an integral fixed connection or by bolts), thereby forming a shell-shaped cabinet 1.

[0049] Reference Figures 1-3 The motor 2 and oil pump 3 are respectively connected to the top and bottom sides of the mounting plate 11 (e.g., by bolts). The output shaft of the motor 2 is connected to the oil pump 3 (e.g., by a key or by a gearbox, with the gearbox fixedly connected to the mounting plate 11 by bolts). The oil tank 4 is located inside the cabinet 1 and is fixedly connected to the cabinet 1 (e.g., the outer wall of the oil tank 4 is fixedly connected to the inner wall of the cabinet 1 by bolts, adhesive, snap-fit, or clamping). The oil pump 3 is connected to the oil suction pipe 5 and the oil delivery pipe 6 respectively. The oil suction pipe 5 is vertical, with the end of the oil suction pipe 5 away from the oil pump 3 located in the hydraulic oil at the bottom of the inner cavity of the oil tank 4. The end of the oil delivery pipe 6 away from the oil pump 3 is connected to and communicates with the valve body. The valve body is fixedly installed on the upper surface of the mounting plate 11 by bolts or welding.

[0050] Reference Figure 3 and Figure 4 It also includes an air filter 7 that is connected to the fuel tank 4. The air filter 7 includes a first mounting cylinder 71, a filter screen 72 and a cover 73; the air filter 7 is inserted and disposed on the top of the fuel tank 4.

[0051] Reference Figure 3 and Figure 4The fuel tank 4 is a shell structure, comprising a top shell plate 41, side shell plates, and a bottom shell plate that are integrally and fixedly connected. A vertical cylinder 42 is connected to the upper surface of the top shell plate 41 (e.g., through an integral fixed connection), and the vertical cylinder 42 is inserted into the mounting hole of the mounting plate 11. The bottom end of the first mounting cylinder 71 is detachably connected to the vertical cylinder 42 via threads, and the top end is detachably connected to the cover 73 via threads. The cover 73 is fitted around the outer periphery of the first mounting cylinder 71; a longitudinally arranged air inlet gap 730 is provided inside the cover 73; a filter screen 72 is inserted into the vertical cylinder 42 and is detachably connected.

[0052] Reference Figure 3 , Figure 4 and Figure 5 The housing 73 includes a detachably connected inner cylinder 731 and an outer cylinder 732, with the outer cylinder 732 fitted around the outer periphery of the inner cylinder 731. An air inlet gap 730 is located between the inner cylinder 731 and the outer cylinder 732; the inner cylinder 731 has a top-opening structure, and the outer cylinder 732 has a sealing plate 7321 at its top. Outside air flows into the inner cavity of the oil tank 4 through the air inlet gap 730, thereby achieving pressure balance within the oil tank 4 and preventing problems such as oil pressure deformation of the oil tank 4 and cavitation in the oil pump 3. As outside air flows upward within the air inlet gap 730, heavier impurity particles (such as dust) cannot pass through the air filter 7 and enter the oil tank 4, thus reducing hydraulic oil contamination and consequently reducing wear on the oil pump 3 and extending its service life.

[0053] Reference Figure 4 , Figure 5 and Figure 6 The inner cylinder 731 has several longitudinally arranged support fins 7311 on its outer wall (e.g., through an integral fixed connection or through a threaded connection), which are arranged in a circumferential array along the outer wall of the inner cylinder 731. An air inlet gap 730 is located between adjacent support fins 7311. A sealing plate 7321 is pressed against the top surface of the inner cylinder 731. A vent hole 7313 is located at the top of the side wall of the inner cylinder 731, with both ends of the vent hole 7313 communicating with the air inlet gap 730 and the inner cavity of the inner cylinder 731, respectively. The vent hole 7313 ensures the connectivity of the air filter 7.

[0054] Reference Figure 4 and Figure 6 The inner wall of the inner cylinder 731 has an inner extension fin 7312 at the top (for example, by an integral fixed connection or by bolts). The vent hole 7313 passes through the inner extension fin 7312. The inner extension fin 7312 is pressed against the top surface of the first mounting cylinder 71, thereby realizing the tightening of the first mounting cylinder 71 and the cover 73.

[0055] Reference Figure 4 and Figure 7The inner wall of the first mounting cylinder 71 is provided with an inner extension ring 711 at its top end, and the top surface of the inner extension ring 711 is provided with an inner extension ring groove 7111. When outside air flows into the inner cavity of the first mounting cylinder 71 through the top of the air inlet gap 730, the gas in the outside air is in a horizontal flow state, and the impurity particles in the outside air are in a downward oblique movement state (affected by their own weight). Some impurity particles will fall into the inner extension ring groove 7111, thereby reducing the amount of impurity particles entering the oil tank 4, so as to reduce the contamination problem of hydraulic oil, thereby reducing the wear of oil pump 3 and improving the service life of oil pump 3.

[0056] Reference Figure 7 The top of the inner ring groove 7111 is lower than the bottom surface of the sealing plate 7321 and higher than the top surface of the first mounting cylinder 71. That is, there is a gap between the top of the inner ring 711 and the bottom surface of the sealing plate 7321, thereby ensuring the connectivity of the air filter 7.

[0057] Reference Figure 4 and Figure 5 The first mounting cylinder 71 is sleeved on the outer periphery of the vertical cylinder 42. The inner wall of the inner cylinder 731 is detachably connected to the outer wall of the first mounting cylinder 71 by threads; the inner wall of the outer cylinder 732 is detachably connected to the outer wall of the support fin 7311 by threads.

[0058] Reference Figure 4 and Figure 8 The filter screen 72 includes a mesh body 721 and a limiting ring 722 (e.g., integrally fixed) installed at the top edge of the mesh body 721. The bottom surface of the limiting ring 722 is pressed against the top surface of the vertical cylinder 42, thereby preventing the filter screen 72 from falling into the oil tank 4. The outer edge of the mesh body 721 and the inner edge of the limiting ring 722 are fixed by welding. The inner sidewall of the first mounting cylinder 71 is provided with an inner extension protrusion 712. The bottom surface of the inner extension protrusion 712 is pressed against the top surface of the limiting ring 722, thereby clamping the filter screen 72 and preventing the filter screen 72 from loosening during operation. The filter screen 72 is used to block impurity particles in the outside air, thereby reducing the amount of impurity particles entering the oil tank 4, mitigating the contamination problem of hydraulic oil, and thus reducing the wear of the oil pump 3 and improving the service life of the oil pump 3.

[0059] Reference Figure 9 The outer wall of the vertical cylinder 42 is fitted with a mounting plate 43. The outer wall of the vertical cylinder 42 and the inner wall of the mounting plate 43 are detachably connected by threads. The mounting plate 43 and the top shell plate 41 are respectively located on the upper and lower surfaces of the mounting plate 11. The mounting plate 43 and the mounting plate 11 are sealed and fixedly connected (for example, by bolts and sealing rings).

[0060] Reference Figure 10 and Figure 11The electro-hydraulic steering gear 9 includes a steering wheel 91, a rudder blade 92, a drive shaft 93, and a rotating assembly 94. The steering wheel 91 rotates to provide propulsion for the ship. The steering wheel 91 is connected to the engine and is located below the hull 8; this is standard industry technology and will not be described in detail here. The rudder blade 92 is located in front of the steering wheel 91. The drive shaft 93 is longitudinally inserted into the bottom of the hull 8. The rudder blade 92 is connected to the drive shaft 93 (e.g., by bolts). The rudder blade 92 rotates under the drive shaft 93, thereby adjusting the ship's direction of travel. A base plate 81 is fixedly mounted on the bottom of the hull 8 (fixed by bolts or welding), and the rotating assembly 94 is mounted on the base plate 81. The rotating assembly 94 includes hydraulic cylinders 941, rotating columns 942, and transmission columns 944. Four hydraulic cylinders 941 are arranged in pairs. The rotating column 942 is positioned at the center of the four hydraulic cylinders 941 and is inserted into a receiving hole in the base plate 81 (connected via a bearing). The rotating column 942 is coaxially aligned with and fixedly connected to the transmission shaft 93 (e.g., by bolts or an integral connection). Four extension arms 943 are fixedly mounted on the side wall of the rotating column 942 (e.g., by an integral connection or bolts), arranged in pairs. Each end of the rotating column 942 has a pair of extension arms 943. A slot is provided between the two extension arms 943 at the same end of the rotating column 942. Two transmission columns 944 are respectively positioned within the two slots. The transmission columns 944 and the outputs of the hydraulic cylinders 941 on the same side are vertically fixedly connected (e.g., by bolts). The hydraulic cylinder 941 can drive the two rotating columns 942 to move in opposite directions, thereby driving the rotating columns 942, the drive shaft 93 and the rudder blade 92 to rotate.

[0061] Reference Figure 2 and Figure 11 The hydraulic station for the ship's steering gear is fixedly mounted on the upper surface of the base plate 81 by bolts; there are at least two hydraulic stations for the ship's steering gear, and the same hydraulic station for the ship's steering gear is connected to two hydraulic cylinders 941 located diagonally through oil pipes 6, thereby realizing the driving of four hydraulic cylinders 941.

[0062] Reference Figure 4 and Figure 9 The user rotates the first mounting cylinder 71 to separate it from the vertical cylinder 42, then grasps the top edge of the filter screen 72 to pull it out of the oil tank 4, and then cleans or replaces the filter screen 72. The user rotates the cover 73 to separate it from the first mounting cylinder, and then removes the cover 73 for cleaning or replacement. The user rotates the inner cylinder 731 to separate it from the outer cylinder 732, and then cleans the air intake gap 730, the vent 7313, and the inner annular groove 7111.

[0063] Reference Figure 4 and Figure 12 The intake gap 730 has a circular cross-section. A filter strip 73113 (made of, for example, polyurethane material) is located in the center of the inner cavity of the intake gap 730. A locking protrusion 73114 is located within the intake gap 730. The locking protrusion 73114 is fixedly connected to the outer wall of the support sidewall (e.g., through an integral fixed connection). Several locking protrusions 73114 are provided, each abutting against the filter strip 73113 from both the upper and lower ends, thereby limiting the position of the filter strip 73113. A sealing ball 73111 is located within the intake gap 730. An inner protrusion 73112 (e.g., through an integral fixed connection) is located at the bottom end of the inner sidewall of the intake gap 730 (i.e., the bottom end of the outer wall of the support sidewall). The sealing ball 73111 presses against the inclined surface of the inner protrusion 73112 under its own weight, thereby preventing the sealing ball 73111 from detaching from the intake gap 730. A one-way valve 74 is installed at the top of the air filter 7; the one-way valve 74 is inserted into the sealing plate 7321. When the hydraulic oil level drops, the oil tank 4 draws in outside air, and the sealing ball 73111 rises upward under air pressure, creating an air intake gap between the sealing ball 73111 and the inner protrusion 73112. Most impurity particles are then blocked by the sealing ball 73111 from the outside (i.e., outside the air filter 7). When the hydraulic oil level rises, the oil tank 4 forces out the air from its own cavity, which then flows through the one-way valve 74 to the outside of the air filter 7.

[0064] As the filter strip 73113 ages, it produces debris: debris from the top of the filter strip 73113 accumulates on its top surface; debris from the middle of the filter strip 73113 is clamped and confined in the middle position; debris from the bottom of the filter strip 73113 falls downwards, and some of this debris leaks directly out through the bottom of the air intake gap 730. During the up-and-down movement of the sealing ball 73111, the remaining debris is continuously struck and crushed, and the crushed debris leaks out through the bottom of the air intake gap 730. This patent can prevent debris from falling into the oil tank 4, thereby avoiding the problem of hydraulic oil contamination in the oil tank 4.

[0065] Reference Figure 13The one-way valve 74 includes a straight cylindrical portion 741, a sealing ball 742, a first protrusion 743, and a curved cylindrical portion 744. The straight cylindrical portion 741 is vertically inserted into the through hole of the sealing plate 7321 and is sealed and fixedly connected (e.g., by bolts and sealing rings or by welding). The first protrusion 743 is fixedly disposed at the bottom of the inner wall of the straight cylindrical portion 741 (e.g., by an integral fixed connection). The sealing ball 742 is located in the inner cavity of the straight cylindrical portion 741 and is naturally pressed against the inclined side of the first protrusion 743 by its own weight. When the oil tank 4 needs to vent, the air pressure will press down on the sealing ball 731, preventing the air inlet gap 730 from opening; while the sealing ball 742 will be pushed upward by the air pressure, forming an outlet gap between the sealing ball 742 and the first protrusion 743, thus achieving venting. The bent cylinder 744 is n-shaped, and one end of the bent cylinder 744 is sealed and fixedly connected to the top of the straight cylinder 741 (for example, by an integral fixed connection), thereby preventing external impurity particles from entering the straight cylinder 741, thereby reducing the wear of the oil pump 3 and improving the service life of this utility model.

[0066] The electro-hydraulic steering gear 9 also includes an electrical cabinet, which is bolted to the upper surface of the base plate 81. The engine's fuel supply module and the motor 2 are connected to the electrical cabinet via wires and signal lines, respectively. The electrical cabinet is also connected to the ship's power supply system and computer control system via wires and signal lines, respectively. The computer control system controls the start-up, shutdown, and other operating states of the engine and the ship's steering gear hydraulic station through the electrical cabinet.

[0067] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0068] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" 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 a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0069] In conclusion, for those skilled in the art, any changes, modifications, substitutions, or variations made to this utility model based on its guidance, without departing from its principles and spirit, shall still fall within the protection scope of this utility model.

Claims

1. A hydraulic station for a ship's steering gear, characterized in that: It includes a cabinet (1), a motor (2), an oil pump (3), and an oil tank (4); the top of the cabinet (1) is provided with a mounting plate (11), the motor (2) and the oil pump (3) are respectively connected to the top and bottom sides of the mounting plate (11), and the motor (2) and the oil pump (3) are connected; the oil tank (4) is set in the inner cavity of the cabinet (1), and the oil pump (3) is respectively connected to the oil extraction pipe (5) and the oil delivery pipe (6); It also includes an air filter (7) in communication with the oil tank (4), the air filter (7) including a first mounting cylinder (71), a filter screen (72) and a cover (73); A vertical cylinder (42) is connected to the upper surface of the top shell plate (41) of the oil tank (4), and the vertical cylinder (42) is inserted into the mounting hole of the mounting plate (11); the bottom end of the first mounting cylinder (71) is detachably connected to the vertical cylinder (42), and the top end is detachably connected to the cover (73); the cover (73) is fitted around the outer periphery of the first mounting cylinder (71); the cover (73) is provided with a longitudinally arranged air inlet gap (730); the filter screen (72) is inserted into the vertical cylinder (42) and is detachably connected; The air intake gap (730) is provided with a filter strip (73113) in the middle of the inner cavity; the bottom of the air intake gap (730) is provided with a sealing ball (73111) and an inner protrusion (73112), and the sealing ball (73111) is pressed against the inner protrusion (73112); a one-way valve (74) is installed at the top of the air filter (7).

2. The hydraulic station for ship steering gear according to claim 1, characterized in that: The cover (73) includes a detachably connected inner cylinder (731) and an outer cylinder (732), and the air inlet gap (730) is disposed between the inner cylinder (731) and the outer cylinder (732); the inner cylinder (731) has a top opening structure, and the top of the outer cylinder (732) is provided with a sealing plate (7321).

3. The hydraulic station for ship steering gear according to claim 2, characterized in that: The outer wall of the inner cylinder (731) is provided with a plurality of longitudinally arranged support fins (7311), which are arranged in a circumferential array along the outer wall of the inner cylinder (731); the air inlet gap (730) is provided between adjacent support fins (7311); the sealing plate (7321) is pressed against the top surface of the inner cylinder (731), and the top of the side wall of the inner cylinder (731) is provided with a vent hole (7313), the two ends of the vent hole (7313) are respectively connected to the air inlet gap (730) and the inner cavity of the inner cylinder (731).

4. The hydraulic station for ship steering gear according to claim 3, characterized in that: The inner wall of the inner cylinder (731) is provided with an inner extension fin (7312) at the top, and the vent (7313) passes through the inner extension fin (7312); the inner extension fin (7312) is pressed against the top surface of the first mounting cylinder (71).

5. The hydraulic station for ship steering gear according to claim 4, characterized in that: The top of the inner wall of the first mounting cylinder (71) is provided with an inner extension ring (711), and the top surface of the inner extension ring (711) is provided with an inner extension ring groove (7111).

6. The hydraulic station for a ship's steering gear according to claim 5, characterized in that: The top of the inner annular groove (7111) is lower than the bottom surface of the sealing plate (7321) and higher than the top surface of the first mounting cylinder (71).

7. The marine steering gear hydraulic station according to claim 6, characterized in that: The first mounting cylinder (71) is sleeved on the outer periphery of the vertical cylinder (42).

8. The hydraulic station for a ship's steering gear according to claim 7, characterized in that: The filter screen (72) includes a mesh body (721) and a limiting ring (722) installed at the top edge of the mesh body (721), with the bottom surface of the limiting ring (722) pressed against the top surface of the vertical cylinder (42).

9. The hydraulic station for a ship's steering gear according to claim 8, characterized in that: The inner wall of the first mounting cylinder (71) is provided with an inner extension protrusion (712), and the bottom surface of the inner extension protrusion (712) is pressed at the top surface of the limiting ring (722).

10. The hydraulic station for a ship's steering gear according to claim 9, characterized in that: The outer wall of the vertical tube (42) is fitted with an installation plate (43). The vertical tube (42) and the installation plate (43) are detachably connected. The installation plate (43) and the top shell plate (41) are respectively located on the upper and lower surfaces of the installation plate (11). The installation plate (43) and the installation plate (11) are sealed and fixedly connected.

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