Oil taking and discharging structure of yaw speed reducer

Abstract

An oil taking and discharging structure of a yaw speed reducer comprises a lower box body, a last-stage gear ring and a penultimate-stage gear ring which are coaxially connected from bottom to top, an oil discharging screw plug is assembled on the lower box body, and the oil taking and discharging structure is characterized in that a supporting cylinder is coaxially fixed between the last-stage gear ring and the penultimate-stage gear ring, the axial height of the supporting cylinder is 1 / 3-1 / 2 of the axial height of the last-stage gear ring, and the axial height of the supporting cylinder is 1 / 3-1 / 2 of the axial height of the penultimate-stage gear ring. An oil taking cavity is formed in an inner cavity of the supporting cylinder, an oil taking hole communicated with the oil taking cavity is formed in the supporting cylinder, and an oil taking valve capable of being connected with vacuum equipment to extract oil and a sealing gasket arranged on the oil taking valve in a sleeving mode are assembled on the oil taking hole. The supporting cylinder is coaxially fixed between the last-stage gear ring and the penultimate-stage gear ring, the axial space is formed between the two stages of gear rings, the oil taking cavity is formed in an inner cavity of the supporting cylinder, the oil taking hole is formed in the supporting cylinder, it can be guaranteed that an oil sample taken out of the oil taking cavity can accurately reflect the overall quality of an oil product, and the reliability of oil sampling is improved; mistaken replacement of lubricating oil due to improper sampling is avoided, and oil waste is reduced.

Description

Technical Field

[0001] The utility model relates to an oil taking and releasing structure of a yaw reducer, belonging to the technical field of yaw reducer assembly. Background Art

[0002] As one of the important components of the wind turbine, the yaw reducer is responsible for driving the entire unit to yaw. When the unit determines the wind direction and needs to yaw and orient, the system transmits a signal to the matching motor of the yaw reducer, so that it is powered on and starts working. The power is transmitted to the yaw gear through the output shaft of the reducer, thereby realizing the yaw and orientation of the wind turbine. The existing yaw reducers are all installed vertically on the base of the nacelle. Due to the harsh operating environment of the wind turbine, regular inspection and maintenance are required, including oil quality inspection of the lubricating oil. When the oil quality no longer meets the working conditions of the reducer, the lubricating oil should be replaced immediately to ensure the normal operation of the reducer and the entire unit. Due to normal wear and tear during the operation of the reducer, the iron filings will sink to the bottom of the reducer. The oil extraction hole of the existing reducer is located at the upper end of the lower box mounting flange. The operating space is limited and the iron filings content in the oil sample taken out is too high, which cannot correctly reflect the overall quality of the oil. If the lubricating oil can be used normally but the test result is unqualified, the lubricating oil will be replaced, which will waste the lubricating oil and increase the cost of use. Utility Model Content

[0003] The utility model provides an oil taking and draining structure for a yaw reducer, in which a supporting cylinder is coaxially fixed between the last gear ring and the penultimate gear ring, and an axial space is formed between the two gear rings, so that the inner cavity of the supporting cylinder forms an oil taking cavity, and the oil taking hole is opened on the supporting cylinder, which can ensure that the oil sample taken out of the oil taking cavity can accurately reflect the overall quality of the oil product, improve the reliability of oil sampling, avoid incorrect replacement of lubricating oil due to improper sampling, and reduce oil waste.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The oil taking and draining structure of the yaw reducer comprises a lower housing, a final gear ring and a penultimate gear ring which are coaxially connected from bottom to bottom, an oil drain plug is mounted on the lower housing, and is characterized in that a support cylinder is coaxially fixed between the final gear ring and the penultimate gear ring, the axial height of the support cylinder is 1 / 3 to 1 / 2 of the axial height of the final gear ring, an oil taking chamber is formed in the inner cavity of the support cylinder, an oil taking hole connected to the oil taking chamber is arranged on the support cylinder, an oil taking valve which can be connected to a vacuum device to extract oil and a sealing gasket sleeved on the oil taking valve are mounted on the oil taking valve.

[0006] Preferably, the support tube is an integrally formed casting, the number of the oil extraction hole is one and it is arranged to be inclined upward, and the angle between the axial direction of the oil extraction hole and the radial direction of the support tube is 30 to 60 degrees.

[0007] Preferably, the lower box body is provided with radially arranged oil drain holes, the number of the oil drain holes is two and they are symmetrically arranged, and the oil drain plugs are assembled in the oil drain holes.

[0008] Preferably, an oil passage groove corresponding to the oil drain hole is provided on the lower box body, and the oil passage groove is arranged along the axial direction of the lower box body and vertically connected with the oil drain hole.

[0009] Preferably, the oil drain plug is a magnetic plug that can absorb iron filings.

[0010] The beneficial effects of the utility model are:

[0011] The oil taking and draining structure of the yaw reducer of the utility model has a supporting cylinder coaxially fixed between the last-stage gear ring and the penultimate-stage gear ring, an axial space is formed between the two-stage gear rings, so that the inner cavity of the supporting cylinder forms an oil taking cavity, the oil taking operation space is increased, the convenience of oil taking is improved, an oil taking hole is provided on the supporting cylinder, and an oil taking valve and a sealing gasket which can be connected with a vacuum device to extract oil are assembled on the oil taking hole, when sampling and testing are required, the vacuum device is connected to the oil taking valve, the oil taking valve is opened to extract the oil in the oil taking cavity for testing, if the test is unqualified, the oil drain plug is removed to drain the oil, and the oil is replaced, the oil taking hole is provided on the supporting cylinder, and is located above the lower box body, iron filings in the oil will fall into the lower box body due to gravity and will not stay in the oil taking cavity, so as to ensure that the oil sample taken out from the oil taking cavity can accurately reflect the overall quality of the oil product, improve the reliability of oil sampling, avoid the wrong replacement of lubricating oil due to improper sampling, and reduce oil waste.

[0012] The oil extraction hole is tilted upward, and the angle between the axial direction of the oil extraction hole and the radial direction of the support tube is 30 to 60 degrees. It is easy to connect with the vacuum equipment, which further improves the convenience of oil extraction. The upward tilted oil extraction hole has a low risk of oil leakage on the vertically installed yaw reducer and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the oil taking and releasing structure of the yaw reducer in a specific implementation manner. DETAILED DESCRIPTION

[0014] Combine the following Figure 1 The embodiments of the present utility model are described in detail.

[0015] The oil taking and draining structure of the yaw reducer comprises a lower housing 1, a final gear ring 2 and a penultimate gear ring 3 which are coaxially connected from bottom to bottom, an oil drain plug 4 is mounted on the lower housing 1, and is characterized in that a support cylinder 4 is coaxially fixed between the final gear ring 2 and the penultimate gear ring 3, an axial height of the support cylinder 5 is 1 / 3 to 1 / 2 of the axial height of the final gear ring 2, an oil taking chamber A is formed in the inner cavity of the support cylinder 5, an oil taking hole 51 connected to the oil taking chamber A is provided on the support cylinder 5, an oil taking valve 6 which can be connected to a vacuum device to extract oil and a sealing gasket 7 sleeved on the oil taking valve 6 are mounted on the oil taking valve 6.

[0016] The oil taking and draining structure of the yaw reducer described above has a coaxially fixed support tube 5 between the last stage gear ring 2 and the penultimate stage gear ring 3, forming an axial space between the two stages of gear rings, so that the inner cavity of the support tube 5 forms an oil taking chamber A, which increases the oil taking operation space and improves the convenience of oil taking. An oil taking hole 51 is opened on the support tube 5, and an oil taking valve 6 and a sealing gasket 7 are installed on the oil taking hole 51. When sampling and testing are required, the vacuum equipment is connected to the oil taking valve 6, and the oil taking valve 6 is opened to extract the oil in the oil taking chamber A for testing. If the test is unqualified, the oil drain plug 4 is removed to drain the oil and replace the oil. The oil taking hole 51 is opened on the support tube 5 and is located above the lower box body 1. The iron filings in the oil will fall into the lower box body 1 due to gravity and will not stay in the oil taking chamber A. It can be ensured that the oil sample taken out of the oil taking chamber A can accurately reflect the overall quality of the oil product, improve the reliability of oil sampling, avoid incorrect replacement of lubricating oil due to improper sampling, and reduce oil waste.

[0017] The support tube 5 is an integrally formed casting, the number of the oil extraction hole 51 is one and it is tilted upward, and the angle α between the axial direction of the oil extraction hole and the radial direction of the support tube is 30 to 60 degrees. The support tube 5 is a casting, which is lighter than a forging, which is conducive to improving the power density of the reducer. The oil extraction hole 51 is tilted upward, and the angle α with the radial direction of the support tube is 30 to 60 degrees, so that the oil extraction valve 6 is tilted upward after being assembled in place, which is convenient to connect with the vacuum equipment, further improving the convenience of oil extraction, and the upward tilted oil extraction hole 51 has a small risk of oil leakage on the vertically installed yaw reducer and is highly practical.

[0018] The lower box body is provided with radially arranged oil drain holes 11, the number of the oil drain holes 11 is two and they are symmetrically arranged, and the oil drain screw plug 3 is assembled in the oil drain holes 11. When draining oil, the two oil drain holes 11 drain oil at the same time, thereby improving the oil drain efficiency.

[0019] The lower housing 11 is provided with an oil groove 12 corresponding to the oil drain hole 11, and the oil groove 12 is arranged along the axial direction of the lower housing and vertically connected with the oil drain hole 11. The oil groove 12 is provided along the axial direction at the inner end of the oil drain hole 11, and the lubricating oil is introduced into the oil drain hole 11 during oil draining, thereby improving the oil draining efficiency, and the iron filings in the oil will accumulate in the oil groove 12, thereby reducing the influence of the iron filings on the bearing in the lower housing, and also facilitating the effective discharge of the iron filings during oil draining.

[0020] The drain plug 4 is a magnetic plug that can absorb iron chips. The iron chips in the oil fall into the oil tank 12 and are absorbed by the drain plug 4. When changing the oil, the drain plug 4 can be disassembled to remove some of the iron chips, which is conducive to the timely discharge of the iron chips when draining the oil.

[0021] The above is a complete description of the technical solutions of the embodiments of the utility model in combination with the accompanying drawings. It should be noted that the described embodiments are only part of the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

Claims

1. The oil taking and draining structure of the yaw reducer includes a lower housing, a final gear ring and a penultimate gear ring coaxially connected from bottom to bottom, and an oil drain plug is installed on the lower housing, which is characterized by: A support cylinder is coaxially fixed between the final gear ring and the penultimate gear ring, and the axial height of the support cylinder is 1 / 3 to 1 / 2 of the axial height of the final gear ring. An oil extraction chamber is formed in the inner cavity of the support cylinder, and an oil extraction hole connected to the oil extraction chamber is provided on the support cylinder. The oil extraction hole is equipped with an oil extraction valve that can be connected to a vacuum device to extract oil and a sealing gasket sleeved on the oil extraction valve.

2. The oil taking and releasing structure of the yaw reducer according to claim 1 is characterized in that: The support tube is an integrally formed casting, and the number of the oil extraction hole is one and it is arranged to be inclined upward, and the angle between the axial direction of the oil extraction hole and the radial direction of the support tube is 30 to 60 degrees.

3. The oil taking and releasing structure of the yaw reducer according to claim 1 is characterized in that: The lower box body is provided with oil drain holes arranged in radial direction, the number of the oil drain holes is two and they are arranged symmetrically, and the oil drain screw plugs are assembled in the oil drain holes.

4. The oil taking and releasing structure of the yaw reducer according to claim 1 is characterized in that: The lower box body is provided with an oil passage groove corresponding to the oil drain hole. The oil passage groove is arranged along the axial direction of the lower box body and is vertically connected with the oil drain hole.

5. The oil taking and releasing structure of the yaw reducer according to claim 4 is characterized in that: The oil drain plug is a magnetic plug that can absorb iron filings.

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