Oil conveying device and wind generating set

Abstract

The utility model relates to an oil transportation device and a wind generating set, the oil transportation device comprises: an oil storage member comprising a housing, a first end cover and a second end cover, the first end cover and the second end cover are arranged at the two ends of the housing in the axial direction and enclose together to form an accommodating cavity, an oil suction port and an oil return port are formed in the first end cover, an inflation port is formed in the second end cover, a piston is arranged in the containing cavity, an oil cavity is formed in the side, close to the first end cover, of the piston, and an air cavity is formed in the side, close to the second end cover, of the piston. The inflating part is connected with an inflating opening in the second end cover, and the inflating part is configured to inflate air into the air cavity so that the piston can move towards the first end cover; wherein the oil cavity is filled with oil, the oil suction port and the oil return port are respectively communicated with the oil cavity, and the oil storage piece is connected with the hydraulic pump through the oil suction port and the oil return port. The oil conveying device provided by the embodiment of the utility model can meet the use requirement under the rotating working condition, the phenomenon of air suction of the hydraulic pump is prevented, and the oil conveying device has safer and more stable oil conveying performance.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to an oil delivery device and a wind power generator set. Background Art

[0002] Oil transfer devices play an important role in places where fuel is needed to provide power, especially in the field of wind turbine technology. The impellers of wind turbines need an adaptive oil transfer device under rotating conditions to ensure the normal operation of the impellers.

[0003] However, in the current wind power field, the oil transfer device is generally statically set. Under rotating conditions, the oil storage part in the impeller will rotate with the impeller, causing the hydraulic pump to absorb oil in the oil storage part during the process of sucking oil, which can easily cause damage to the hydraulic pump. Utility Model Content

[0004] The embodiment of the utility model provides an oil delivery device and a wind turbine generator set. The oil delivery device can meet the use requirements under rotating working conditions, prevent the hydraulic pump from cavitation, and has safer and more stable oil delivery performance.

[0005] The embodiment of the present application provides an oil delivery device, which is used in the impeller of a wind turbine generator set and can rotate with the impeller. The oil delivery device includes an oil storage member and an inflatable member. The oil storage member includes a shell, a first end cover and a second end cover. The first end cover and the second end cover are arranged at both ends of the shell in the axial direction and together enclose a receiving chamber. The first end cover has an oil suction port and an oil return port, and the second end cover has an inflatable port. A piston is arranged in the receiving chamber. The side of the piston close to the first end cover forms an oil chamber and the side close to the second end cover forms an air chamber. The inflatable member is connected to the inflatable port on the second end cover, and the inflatable member is configured to fill the air chamber with gas to move the piston toward the first end cover. The oil chamber is filled with oil, the oil suction port and the oil return port are respectively connected to the oil chamber, and the oil storage member is connected to the hydraulic pump through the oil suction port and the oil return port.

[0006] In some embodiments, the oil suction port is disposed at the geometric center of the first end cover.

[0007] In some embodiments, the first end cover has an exhaust port spaced apart from the oil suction port and the oil return port, the oil delivery device includes an exhaust assembly, the exhaust assembly includes an exhaust pipe and a locking piece, the exhaust pipe is plugged into the exhaust port, a locking piece is provided at one end of the exhaust pipe close to the exhaust port and the other end extends into the oil chamber, the gas in the oil chamber is discharged through the exhaust pipe, and the locking piece is configured to control the opening and closing of the exhaust pipe.

[0008] In some embodiments, the distance between the port of the exhaust pipe in the oil chamber and the inner wall of the oil chamber does not exceed 5 mm.

[0009] In some embodiments, the exhaust assembly includes a filter element, which is disposed on a side of the locking element facing away from the exhaust pipe, and the filter element is configured to filter oil in the gas in the exhaust pipe.

[0010] In some embodiments, the exhaust pipe includes a first pipe section and a second pipe section that are interconnected, the first pipe section extends along the axial direction of the shell, and the second pipe section extends along the radial direction of the shell and away from the side of the oil, the exhaust pipe is plugged into the exhaust port through the first pipe section, and the gas in the oil chamber enters the exhaust pipe through the second pipe section.

[0011] In some embodiments, the exhaust assembly includes a hanging weight, which is arranged at one end of the second pipe section close to the oil, and the weight of the hanging weight is greater than the weight of the exhaust pipe, wherein the radial direction coincides with the gravity direction.

[0012] In some embodiments, the oil delivery device also includes a first sensor, which is arranged on the oil storage member and located on the side of the piston close to the air cavity. At least part of the first sensor is located in the air cavity, and the first sensor is configured to detect the air pressure in the air cavity.

[0013] In some embodiments, the first sensor is disposed on the second end cap and spaced apart from the inflation port, and at least a portion of the first sensor passes through the second end cap and is located in the air cavity.

[0014] In some embodiments, the oil delivery device also includes a second sensor, which is arranged on the second end cover and spaced apart from the inflation port. At least part of the second sensor is located in the air cavity, and the second sensor is configured to detect the distance from the piston to the second end cover.

[0015] In some embodiments, the oil delivery device also includes a third sensor, which is arranged on the first end cover and spaced apart from the oil suction port. At least a portion of the third sensor is located in the oil chamber and in contact with the oil. The third sensor is configured to detect the temperature of the oil.

[0016] In some embodiments, the oil storage part includes a plurality of connecting rods, which extend axially. The axial projections of the first end cover and the second end cover exceed the axial projection of the shell. One end of the connecting rod is inserted into the first end cover and the other end is inserted into the second end cover. The plurality of connecting rods are spaced apart in the circumferential direction of the shell.

[0017] In some embodiments, limit rings are provided on both sides of the piston in the axial direction, and the limit rings abut against the inner wall of the shell in the accommodating cavity.

[0018] In some embodiments, the distance between the oil suction port and the oil return port is greater than or equal to 200 mm.

[0019] An embodiment of the present application provides a wind turbine generator set, comprising any of the above-mentioned oil delivery devices.

[0020] The oil delivery device and wind turbine generator set provided in the embodiment of the present application can rotate with the impeller, and the oil delivery device rotating with the impeller can provide reliable oil, so that the operation of the impeller is guaranteed. First, the oil delivery device is a closed oil delivery device, which can reduce the probability of environmental impurities being integrated into the accommodating cavity. Secondly, compared with the related art in which the oil tank is fixed to the cabin and a large flow and large volume oil tank is required, the oil delivery device provided in the embodiment of the present application is smaller in size, and the hydraulic slip ring products of the pipeline under the rotating working condition of the impeller and the fixed working condition of the cabin are eliminated, simplifying the internal structure of the oil delivery device. In addition, the inflatable part can fill the gas into the air cavity to make the piston move toward the first end cover, so that the oil cavity is always full of oil when the oil delivery device is in working state, so that the hydraulic pump absorbs oil through the oil suction port, avoiding the hydraulic pump from absorbing gas and causing the hydraulic pump to be sucked empty, thereby protecting the hydraulic pump. The wind turbine generator set provided in the embodiment of the present application, through the provision of an oil delivery device, and the oil delivery device can rotate along with the impeller, breaking through the traditional practice of fixing the oil delivery device on the nacelle, thereby improving the reliability of the oil delivery device and improving the operating reliability and safety of the wind turbine generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0022] Figure 1 It is a plan view of an oil delivery device according to an embodiment of the utility model;

[0023] Figure 2 It is a left side view of the oil delivery device of the utility model embodiment;

[0024] Figure 3 It is a right side view of the oil delivery device of the utility model embodiment;

[0025] Figure 4 It is a cross-sectional schematic diagram of an oil storage member in an oil delivery device according to an embodiment of the utility model;

[0026] Figure 5 It is a cross-sectional schematic diagram of a part of the structure of the oil delivery device of an embodiment of the utility model;

[0027] Figure 6 It is a schematic diagram of the flow of the oil delivery device according to an embodiment of the utility model.

[0028] Reference numerals:

[0029] 100 oil storage parts; X axial direction; Y radial direction;

[0030] 110 housing; 111 accommodating chamber; 1111 oil chamber; 1112 air chamber;

[0031] 120 first end cover; 121 oil suction port; 122 oil return port; 123 exhaust port;

[0032] 130 second end cover; 131 inflation port;

[0033] 140 piston;

[0034] 150 connecting rod;

[0035] 200 inflatable parts;

[0036] 300 exhaust assembly;

[0037] 310 exhaust pipe; 311 first pipe section; 312 second pipe section;

[0038] 320 locking parts;

[0039] 330 filter element;

[0040] 340 hanging weights;

[0041] 350 bearings;

[0042] 400 first sensor;

[0043] 500 second sensor;

[0044] 600 third sensor.

[0045] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0046] The features and exemplary embodiments of various aspects of the utility model will be described in detail below. In the detailed description below, many specific details are proposed in order to provide a comprehensive understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without the need for some of these specific details. The following description of the embodiment is only to provide a better understanding of the utility model by illustrating an example of the utility model. In the drawings and the following description, at least part of the known structures and technologies are not shown in order to avoid unnecessary ambiguity to the utility model; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0047] The directional words appearing in the following description are all directions shown in the figure, and do not limit the specific structure of the oil delivery device and wind turbine generator set of the utility model. In the description of the utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0048] The oil delivery device plays an important role in places where fuel is needed to provide power, especially in the field of wind turbine technology. The impeller of the wind turbine needs an adapted oil delivery device under rotating conditions to ensure the normal operation of the impeller. However, in the current wind power field, the oil delivery device is generally statically set. Under rotating conditions, the oil storage part in the impeller will rotate with the impeller, causing the hydraulic pump to suck oil in the oil storage part. The phenomenon of cavitation may occur, which is easy to cause damage to the hydraulic pump.

[0049] In order to solve the above problems, the embodiments of the present application provide an oil delivery device and a wind turbine generator set.

[0050] Please refer to Figures 1 to 5 As shown, an embodiment of the present application provides an oil delivery device, which is used in the impeller of a wind turbine generator set and can rotate with the impeller, and the oil delivery device includes an oil storage member 100 and an air filling member 200. The oil storage member 100 includes a housing 110, a first end cover 120 and a second end cover 130, the first end cover 120 and the second end cover 130 are arranged at both ends of the housing 110 in the axial direction X and together enclose a receiving cavity 111, the first end cover 120 has an oil suction port 121 and an oil return port 122, and the second end cover 130 has an air filling port 131, and a piston 140 is arranged in the receiving cavity 111, and the side of the piston 140 close to the first end cover 120 forms an oil cavity 1111 and the side close to the second end cover 130 forms an air cavity 1112. The inflatable member 200 is connected to the inflatable port 131 on the second end cover 130, and the inflatable member 200 is configured to fill gas into the gas cavity 1112 to move the piston 140 toward the first end cover 120. The oil cavity 1111 is filled with oil, the oil suction port 121 and the oil return port 122 are respectively connected to the oil cavity 1111, and the oil storage member 100 is connected to the hydraulic pump through the oil suction port 121 and the oil return port 122.

[0051] The piston 140 is connected to the inner wall of the accommodating chamber 111 in a dynamic seal.

[0052] The gas filled into the air cavity 1112 by the inflator 200 includes nitrogen or other inert gases.

[0053] The connection between the first end cover 120 and the housing 110, and the second end cover 130 and the housing 110 includes but is not limited to welding connection, adhesive connection, etc. Optionally, the connection between the first end cover 120 and the housing 110, and the second end cover 130 and the housing 110 includes flange connection through a tie rod.

[0054] The oil suction port 121 and the oil return port 122 are arranged at intervals. The oil suction port 121 is configured to provide oil to the hydraulic pump, and the oil return port 122 is configured to flow the oil that needs to be returned from the hydraulic pump to the oil chamber 1111 of the oil storage member 100 .

[0055] Optionally, the first end cover 120 has a symmetrical structure, and the oil suction port 121 is located at the center or near the center of the first end cover 120. With this arrangement, since the oil storage component 100 and the impeller rotation axis are almost parallel, during the rotation of the oil storage component 100, all parts except the axis are in a relatively high state (the high state is easily filled with gas, resulting in air suction). Therefore, arranging the oil suction port 121 at the center or near the center of the first end cover 120 can reduce the risk of air suction of the hydraulic pump.

[0056] During the operation of the oil delivery device, the hydraulic pump sucks out the oil in the oil chamber 1111 through the oil suction port 121, and at the same time the inflatable member 200 inflates the air into the air chamber 1112 through the inflating port 131, so that the volume of the oil in the oil chamber 1111 is consistent with the volume of the oil chamber 1111.

[0057] The oil delivery device provided in the embodiment of the present application can rotate with the impeller, and the oil delivery device rotating with the impeller can provide reliable oil, so that the operation of the impeller is guaranteed. First, the oil delivery device is a closed oil delivery device, which can reduce the probability of the accommodating chamber 111 being integrated with environmental impurities. Secondly, compared with the related art in which the oil tank is fixed to the cabin and a large flow and large volume oil tank is required, the oil delivery device provided in the embodiment of the present application is smaller in size, and the hydraulic slip ring products of the pipeline under the rotating working condition of the impeller and the fixed working condition of the cabin are eliminated, simplifying the internal structure of the oil delivery device. In addition, the inflatable member 200 can fill the gas into the air cavity 1112 so that the piston 140 moves toward the first end cover 120, so that the oil cavity 1111 is always full of oil in the working state of the oil delivery device, so that the hydraulic pump absorbs oil through the oil suction port 121, avoiding the hydraulic pump from absorbing gas and causing the hydraulic pump to be sucked empty, thereby protecting the hydraulic pump.

[0058] In some embodiments, the oil suction port 121 is disposed at the geometric center of the first end cover 120 .

[0059] The shape of the first end cap 120 includes but is not limited to a circle, a rectangle, a square, etc. Here, "geometric center" is a term in the field of mathematics.

[0060] The oil delivery device provided in the embodiment of the present application, by arranging the oil suction port 121 at the geometric center, can ensure with a high probability that the oil level will be above the oil suction port 121 during rotation, thereby avoiding the hydraulic pump from being sucked empty, even if the oil chamber 1111 leaks and is not full of oil.

[0061] In some embodiments, the first end cover 120 has an exhaust port 123 spaced apart from the oil suction port 121 and the oil return port 122, the oil delivery device includes an exhaust assembly 300, the exhaust assembly 300 includes an exhaust pipe 310 and a locking piece 320, the exhaust pipe 310 is plugged into the exhaust port 123, the exhaust pipe 310 is provided with a locking piece 320 at one end close to the exhaust port 123 and the other end extends into the oil chamber 1111, the gas in the oil chamber 1111 is discharged through the exhaust pipe 310, and the locking piece 320 is configured to control the opening and closing of the exhaust pipe 310.

[0062] The locking member 320 includes a solenoid valve structure and the like.

[0063] A bearing 350 may be provided between the exhaust pipe 310 and the exhaust port 123 , so that the exhaust pipe 310 can rotate relative to the exhaust port 123 .

[0064] Optionally, along the axial direction X, the first end cover 120 is projected into a circular structure, the exhaust port 123 is located at the center of the first end cover 120, and the exhaust pipe 310 is inserted into the exhaust port 123, so that the radius of the exhaust pipe 310 can be maximized and a better exhaust effect can be achieved.

[0065] The shape of the exhaust pipe 310 includes a straight shape, a bent shape, and the like.

[0066] In the oil delivery device provided in the embodiment of the present application, part of the oil in the oil chamber 1111 will be lost in the circulating oil circuit of the hydraulic pump, so that gas exists in the oil chamber 1111. The gas in the oil chamber 1111 is discharged through the exhaust pipe 310 to prevent the hydraulic pump from being sucked empty.

[0067] In some embodiments, the distance between the port of the exhaust pipe 310 located in the oil chamber 1111 and the inner wall of the oil chamber 1111 does not exceed 5 mm.

[0068] Optionally, the inner wall of the oil chamber 1111 includes an upper wall surface.

[0069] The distance between the port of the exhaust pipe 310 and the inner wall of the oil chamber 1111 includes 5 mm, 4 mm, 3 mm, 2 mm, etc., and the distance value can be adjusted according to actual conditions.

[0070] In the actual use of the oil delivery device provided in the embodiment of the present application, if gas appears in the oil chamber 1111, since the density of the gas is less than the density of the oil, limiting the distance from the port of the exhaust pipe 310 to the inner wall of the oil chamber 1111 is beneficial to the discharge of the gas.

[0071] In some embodiments, the exhaust assembly 300 includes a filter 330 . The filter 330 is disposed on a side of the locking member 320 facing away from the exhaust pipe 310 . The filter 330 is configured to filter oil in the gas in the exhaust pipe 310 .

[0072] The filter element 330 includes a filter mesh, filter cotton, activated carbon and other structures.

[0073] The oil delivery device provided in the embodiment of the present application can filter the oil in the exhaust gas through the filter element 330, thereby preventing the oil from polluting the environment after being discharged.

[0074] In some embodiments, the exhaust pipe 310 includes a first pipe section 311 and a second pipe section 312 that are interconnected. The first pipe section 311 extends along the axial direction X of the shell 110, and the second pipe section 312 extends along the radial direction Y of the shell 110 and away from the side of the oil. The exhaust pipe 310 is plugged into the exhaust port 123 through the first pipe section 311, and the gas in the oil chamber 1111 enters the exhaust pipe 310 through the second pipe section 312.

[0075] The oil delivery device provided in the embodiment of the present application, through the arrangement of the pipe sections of the exhaust pipe 310 including the first pipe section 311 and the second pipe section 312, allows the gas in the oil chamber 1111 to be discharged through the second pipe section 312 and the first pipe section 311, and the structural arrangement of the exhaust pipe 310 is conducive to the discharge of the gas.

[0076] In some embodiments, the exhaust assembly 300 includes a hanging weight 340, which is disposed at one end of the second pipe section 312 close to the oil, and the weight of the hanging weight 340 is greater than the weight of the exhaust pipe 310, wherein the radial direction Y coincides with the direction of gravity.

[0077] In the oil, the hanging weight 340 is always in a vertically downward position due to the effect of gravity, so that the second pipe section 312 extending in the opposite direction of gravity is in a vertically upward position.

[0078] Optionally, the suspending weight 340 may be a steel plumb structure. The suspending weight 340 and the second pipe section 312 may be an integrated structure. The exhaust pipe 310 and the suspending weight 340 are supported at the exhaust port 123 of the first end cover 120 through a bearing 350 .

[0079] The suspended weight 340 utilizes the principle of gravity field and the principle that the density of gas is less than that of oil to achieve effective exhaust.

[0080] Optionally, the weight of the suspended weight 340 is five times, six times, or even multiple times the weight of the exhaust pipe 310 .

[0081] The oil delivery device provided in the embodiment of the present application utilizes the gravity of the suspended weight 340 to ensure that the second pipe section 312 always stably extends in the radial direction Y, ensuring that the second pipe section 312 always discharges the gas at the top of the oil chamber 1111 vertically upward, with better sustainability.

[0082] In some embodiments, the oil delivery device also includes a first sensor 400, which is arranged on the oil storage member 100 and is located on the side of the piston 140 close to the air cavity 1112. At least a portion of the first sensor 400 is located in the air cavity 1112, and the first sensor 400 is configured to detect the air pressure in the air cavity 1112.

[0083] Optionally, the oil delivery device also includes a main control system.

[0084] The first sensor 400 may be connected to the piston 140 or may be connected to the second end cover 130 .

[0085] Optionally, the first sensor 400 includes a pressure sensor, and the pressure sensor includes but is not limited to a strain gauge pressure sensor, a piezoresistive pressure sensor, and the like.

[0086] When the air pressure in the air cavity 1112 drops abnormally due to air leakage or the air pressure in the first sensor 400 rises abnormally due to sudden factors (exceeding the tolerance pressure of the hydraulic pump oil seal, causing the hydraulic pump to fail), the abnormality is promptly fed back to the main control system to trigger failure protection.

[0087] The oil delivery device provided in the embodiment of the present application can detect the air pressure through the provision of the first sensor 400, and detect the pressure inside the air cavity 1112, so that the pressure inside the air cavity 1112 can be visualized.

[0088] In some embodiments, the first sensor 400 is disposed on the second end cover 130 and spaced apart from the inflation port 131 , and at least a portion of the first sensor 400 passes through the second end cover 130 and is located in the air cavity 1112 .

[0089] The oil delivery device provided in the embodiment of the present application facilitates the installation and maintenance of the first sensor 400 by disposing the first sensor 400 on the second end cover 130 , and avoids the influence of disposing the first sensor 400 on the movement of the piston 140 on the housing 110 .

[0090] In some embodiments, the oil delivery device also includes a second sensor 500, which is arranged on the second end cover 130 and spaced apart from the inflation port 131. At least part of the second sensor 500 is located in the air cavity 1112. The second sensor 500 is configured to detect the distance from the piston 140 to the second end cover 130.

[0091] The second sensor 500 is configured to detect the distance from the piston 140 to the second end cover 130. When an oil leakage occurs in the oil delivery device, the oil in the oil chamber 1111 is lost rapidly, causing the distance from the piston 140 to the second end cover 130 to exceed the normal range. The abnormal information is promptly fed back to the main control system, triggering failure protection.

[0092] Optionally, the second sensor 500 includes a displacement sensor.

[0093] The oil delivery device provided in the embodiment of the present application can detect the distance between the piston 140 and the second end cover 130 in real time through the setting of the second sensor 500, and can further determine whether the operation of the oil delivery device is abnormal through the distance between the piston 140 and the second end cover 130, which is conducive to timely detection of the status of the oil delivery device.

[0094] In some embodiments, the oil delivery device also includes a third sensor 600, which is disposed on the first end cover 120 and spaced apart from the oil suction port 121. At least a portion of the third sensor 600 is located in the oil chamber 1111 and in contact with the oil. The third sensor 600 is configured to detect the temperature of the oil.

[0095] When the oil temperature exceeds the normal range allowed by the oil transfer device, the abnormal information will be promptly fed back to the main control system, triggering failure protection.

[0096] The oil delivery device provided in the embodiment of the present application can detect the temperature of the oil in the oil chamber 1111 in real time through the provision of the third sensor 600, which is conducive to timely identification of abnormal information of the oil.

[0097] Under the condition of constant volume, temperature changes will cause significant changes in gas pressure. This pressure change caused by simple temperature changes does not affect the normal operation of the system, so a fault-tolerant control strategy is adopted for this type of situation.

[0098] Please refer to Figure 6As shown, further, the oil delivery device also has a main control method. Before the oil delivery device works, it is necessary to judge the operating conditions. First, it is judged whether the impeller temperature is lower than the start-up permission temperature. If the impeller temperature is lower than the start-up permission temperature, it is secondly judged whether the oil temperature is lower than the allowable temperature. If the impeller temperature is lower than the start-up permission temperature, the oil delivery device is controlled to start, and the position of the piston 140 is judged by the second sensor 500. If the position of the piston 140 is in the preset position, the first sensor 400 is used to judge whether the gas pressure is within the allowable range. If the gas pressure is within the allowable range, the oil delivery device is controlled to operate; if the position of the piston 140 is not within the preset range, an alarm is sounded. If the gas pressure is not within the allowable range, the temperature data is obtained through the third sensor 600, and the gas pressure and temperature are compared. If the data are within the preset range after the comparison, the oil delivery device is controlled to operate. If not within the preset range, an alarm is sounded.

[0099] The first sensor 400, the second sensor 500 and the third sensor 600 form a three-in-one state detection system, which can determine whether the working state of the oil transportation device is normal based on the changes in various physical parameters in the oil transportation device.

[0100] In some embodiments, the oil storage member 100 includes a plurality of connecting rods 150, the connecting rods 150 extend along the axial direction X, the orthographic projections of the first end cover 120 and the second end cover 130 on the axial direction X exceed the orthographic projections of the shell 110, one end of the connecting rod 150 is plugged into the first end cover 120 and the other end is plugged into the second end cover 130, and the plurality of connecting rods 150 are spaced apart in the circumferential direction of the shell 110.

[0101] The number of the connecting rods 150 may be two, three, or the like.

[0102] The connection between the connecting rod 150 and the first end cover 120 and the second end cover 130 includes a detachable connection, a fixed connection, etc. The arrangement of the connecting rod 150 in the circumferential direction of the housing 110 can be uniform or uneven.

[0103] The oil delivery device provided in the embodiment of the present application, through the provision of multiple connecting rods 150, can have better structural strength under rotating conditions, improve the bearing capacity of the overall structure, and be better suitable for rotating conditions.

[0104] In some embodiments, the piston 140 is provided with limit rings on both sides in the axial direction X, and the limit rings abut against the inner wall of the housing 110 in the accommodating cavity 111 .

[0105] The oil delivery device provided in the embodiment of the present application limits the piston 140 through the limiting rings on both sides of the piston 140 to prevent the piston 140 from moving arbitrarily in the accommodating chamber 111 during rotation, causing the oil sealing in the oil chamber 1111 to fail, thereby causing the hydraulic pump to be emptied.

[0106] In some embodiments, the distance between the oil suction port 121 and the oil return port 122 is greater than or equal to 200 mm.

[0107] The distance between the oil suction port 121 and the oil return port 122 includes 200 mm, 210 mm, 220 mm, etc.

[0108] The oil delivery device provided in the embodiment of the present application limits the distance between the oil suction port 121 and the oil return port 122, thereby preventing interference caused by the oil suction port 121 and the oil return port 122 being too close, and avoiding short circuit during oil circulation of the hydraulic pump and damage to the hydraulic pump.

[0109] An embodiment of the present application provides a wind turbine generator set, comprising any of the above-mentioned oil delivery devices.

[0110] The wind turbine generator set provided in the embodiment of the present application, through the provision of an oil delivery device, and the oil delivery device can rotate along with the impeller, breaking through the traditional practice of fixing the oil delivery device on the nacelle, thereby improving the reliability of the oil delivery device and improving the operating reliability and safety of the wind turbine generator set.

[0111] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An oil delivery device, characterized in that: The oil delivery device is used in the impeller of the wind turbine generator set and can rotate with the impeller, and the oil delivery device includes: An oil storage part, comprising a shell, a first end cover and a second end cover, wherein the first end cover and the second end cover are arranged at two ends of the shell in the axial direction and together enclose a receiving cavity, the first end cover has an oil suction port and an oil return port, and the second end cover has an air charging port, a piston is arranged in the receiving cavity, and the side of the piston close to the first end cover forms an oil cavity and the side close to the second end cover forms an air cavity; an inflatable member connected to the inflatable port on the second end cover, the inflatable member being configured to inflate gas into the air cavity to move the piston toward the first end cover; The oil chamber is filled with oil, the oil suction port and the oil return port are respectively connected to the oil chamber, and the oil storage member is connected to the hydraulic pump through the oil suction port and the oil return port.

2. The oil delivery device according to claim 1, characterized in that: The oil suction port is arranged at the geometric center of the first end cover.

3. The oil delivery device according to claim 1, characterized in that: The first end cover is provided with an exhaust port which is spaced apart from the oil suction port and the oil return port. The oil delivery device includes an exhaust assembly, and the exhaust assembly includes an exhaust pipe and a locking member. The exhaust pipe is plugged into the exhaust port. The locking member is provided at one end of the exhaust pipe close to the exhaust port and the other end extends into the oil cavity. The gas in the oil cavity is discharged through the exhaust pipe, and the locking member is configured to control the opening and closing of the exhaust pipe.

4. The oil delivery device according to claim 3, characterized in that: The distance between the port of the exhaust pipe located in the oil chamber and the inner wall of the oil chamber does not exceed 5 mm.

5. The oil delivery device according to claim 3, characterized in that: The exhaust assembly comprises a filter element, which is arranged on a side of the locking element facing away from the exhaust pipe, and is configured to filter oil in the gas in the exhaust pipe.

6. The oil delivery device according to claim 3, characterized in that: The exhaust pipe includes a first pipe section and a second pipe section that are interconnected, the first pipe section extends along the axial direction of the shell, the second pipe section extends along the radial direction of the shell and away from the side of the oil, the exhaust pipe is plugged into the exhaust port through the first pipe section, and the gas in the oil chamber enters the exhaust pipe through the second pipe section.

7. The oil delivery device according to claim 6, characterized in that: The exhaust assembly includes a hanging weight, which is arranged at one end of the second pipe section close to the oil, and the weight of the hanging weight is greater than the weight of the exhaust pipe, wherein the radial direction coincides with the direction of gravity.

8. The oil delivery device according to claim 1, characterized in that: The oil delivery device also includes a first sensor, which is arranged on the oil storage member and located on a side of the piston close to the air cavity. At least a portion of the first sensor is located in the air cavity, and the first sensor is configured to detect the air pressure in the air cavity.

9. The oil delivery device according to claim 8, characterized in that: The first sensor is disposed on the second end cover and is spaced apart from the inflation port. At least a portion of the first sensor passes through the second end cover and is located in the air cavity.

10. The oil delivery device according to claim 1, characterized in that: The oil delivery device also includes a second sensor, which is arranged on the second end cover and spaced apart from the inflation port, at least part of the second sensor is located in the air cavity, and the second sensor is configured to detect the distance from the piston to the second end cover.

11. The oil delivery device according to claim 1, characterized in that: The oil delivery device also includes a third sensor, which is arranged on the first end cover and spaced apart from the oil suction port. At least a part of the third sensor is located in the oil cavity and in contact with the oil. The third sensor is configured to detect the temperature of the oil.

12. The oil delivery device according to claim 1, characterized in that: The oil storage part includes a plurality of connecting rods, which extend along the axial direction. The orthographic projections of the first end cover and the second end cover in the axial direction exceed the orthographic projection of the shell. One end of the connecting rod is plugged into the first end cover and the other end is plugged into the second end cover. The plurality of connecting rods are spaced apart in the circumferential direction of the shell.

13. The oil delivery device according to claim 1, characterized in that: The piston is provided with limiting rings on both sides in the axial direction, and the limiting rings abut against the inner wall of the housing in the accommodating cavity.

14. The oil delivery device according to claim 1, characterized in that: The distance between the oil suction port and the oil return port is greater than or equal to 200 mm.

15. A wind turbine generator set, characterized in that: Comprising the oil transfer device according to any one of claims 1 to 14.

Images