An oil circuit built-in cooling tower reduction gearbox

Abstract

The utility model relates to an oil circuit built-in type cooling tower reduction gearbox, including reduction gearbox, the first cavity and the second cavity that are mutually connected are equipped in the reduction gearbox, the input shaft is equipped in the first cavity, the input shaft lower extreme stretches into the second cavity and connects the shaft head pump, the shaft head pump connects the oil filter, the reduction gearbox corresponds the first communicating hole, the second communicating hole that oil filter import, export respectively are equipped with, the second communicating hole connects the vertical communicating hole, and the vertical communicating hole connects the oil groove. The utility model under the cooperation of each internal communicating hole of shaft head pump and reduction gearbox, realize the oil circuit built-in, fundamentally eliminate the risk that pipe joint loosening and pipeline rupture led to because of vibration, impact, and can work under -30 DEG C, adapt to the adverse working condition, the internal oil circuit is protected by the box body, will not be damaged by the flying pebble, tool collision etc.

Description

Technical Field

[0001] This utility model relates to the field of industrial gearbox technology, specifically to a gearbox for a cooling tower with an internal oil circuit. Background Technology

[0002] Cooling tower gearboxes are used to reduce speed and increase torque, driving the cooling tower fan to operate at a suitable speed. Gear transmissions require lubrication. Currently, the industry uses external oil circuits for oil lubrication of cooling tower gearboxes. An external oil pump motor draws lubricating oil from an oil sump or tank, filters it, and then delivers it to the various bearing housings through the external oil circuit. However, in actual use, the operating environment is quite harsh, and this oil lubrication method has the following drawbacks: 1. Low reliability: A large number of pipe joints are potential leak points. They are prone to loosening and leaking under long-term vibration. Exposed pipes are easily bumped, flattened, or broken. 2. The structure is not compact and occupies a lot of space: The external pipes require additional space for layout and fixation, making the entire transmission unit look messy and bulky; 3. Poor aesthetics: The pipes are crisscrossed and do not look neat. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a cooling tower gearbox with an internal oil circuit. It eliminates the complex external pipelines, making the entire gearbox simple in appearance and compact in size. With the cooperation of the shaft pump and the internal connecting holes of the gearbox body, the oil circuit is internally concealed, which fundamentally eliminates the risk of pipe joint loosening and pipeline rupture caused by vibration and impact. It can also work at -30℃ and adapt to harsh working conditions. The internal oil circuit is protected by the gearbox body and will not be damaged by flying gravel, tool collisions, etc.

[0004] The purpose of this utility model is achieved as follows: A gearbox for a cooling tower with an internal oil circuit includes a gearbox body. The gearbox body has a first cavity and a second cavity that are interconnected. An input shaft, an intermediate shaft, and an output shaft are arranged parallel to each other within the first cavity. Both ends of the input shaft, intermediate shaft, and output shaft are rotatably supported by bearings. The lower end of the input shaft extends into the second cavity and connects to a shaft head pump. The shaft head pump is connected to an oil filter, which is fixed to the outer side of the gearbox body. The gearbox body has a first connecting hole and a second connecting hole corresponding to the inlet and outlet of the oil filter, respectively. The first connecting hole connects the outlet of the shaft head pump to the inlet of the oil filter. The second connecting hole connects to a vertical connecting hole, the outlet of which is located on the top mating surface of the gearbox body. The top mating surface of the gearbox body has an oil groove communicating with the vertical connecting hole, and the oil groove has multiple outlets.

[0005] Preferably, the shaft pump built into the second cavity is fixed to the partition plate between the first cavity and the second cavity.

[0006] Preferably, the partition plate is used for mounting and fixing the lower end bearings of the input shaft and intermediate shaft. The partition plate retracts the input shaft and intermediate shaft into the gearbox, reserving space for the installation of the shaft head pump.

[0007] Preferably, the bearings located at the upper ends of the input shaft, intermediate shaft, and output shaft are limited by the cover, which is fixed to the top mating surface of the gearbox.

[0008] Preferably, the bottom surface of the tank cover and the oil trough form a sealed oil passage.

[0009] Preferably, the upper end of the input shaft extends out of the gearbox and connects to the drive motor, the drive motor is fixed on the input flange, and the input flange is fixed on the gearbox.

[0010] Preferably, the bottom of the second cavity is sealed by a viewing cover, which is fixed to the bottom surface of the gearbox.

[0011] Preferably, the gearbox body is an integral casting, and the first connecting hole, the second connecting hole and the vertical connecting hole are integrally cast using a pre-embedded sand core method.

[0012] The beneficial effects of this utility model are: The input shaft and intermediate shaft are recessed into the gearbox through a partition plate, reserving space for the installation of the shaft head pump. With the cooperation of the shaft head pump and the internal connecting holes of the gearbox, the oil circuit is concealed. All pipelines are inside the gearbox, which can meet the harsh working conditions of -30℃. Compact structure and space-saving: The elimination of the complex external oil pipes makes the entire gearbox look cleaner and easier to install on equipment with limited space. It eliminates a large number of external pipelines, ensuring high reliability and leak prevention; the internal pipeline layout is clearer, making it easier to maintain and inspect; the openings and milled oil grooves inside the housing can control the direction of the oil circuit, ensuring that the lubricating oil can accurately and efficiently lubricate the upper row of roller bearings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the external structure of a gearbox for a cooling tower with an internal oil circuit, according to this utility model.

[0014] Figure 2 This is a schematic diagram of the internal structure of a gearbox for a cooling tower with an internal oil circuit, according to this utility model.

[0015] Figure 3 This is a schematic diagram showing the connection between the oil filter and the shaft pump.

[0016] Figure 4This is a three-dimensional structural diagram of the gearbox.

[0017] Figure 5 for Figure 4 A bottom view.

[0018] Figure 6 This is a top view of the gearbox.

[0019] Figure 7 for Figure 6 AA sectional view.

[0020] in: Gearbox 1; Top mating surface 1.1; Partition plate 1.2; First connecting hole 1.3; Second connecting hole 1.4; Vertical connecting hole 1.5; Oil trough 1.6; Input shaft 2; Intermediate shaft 3; Output shaft 4; First cavity 5; Second cavity 6; Gearbox cover 7; Input flange 8; Shaft pump 9; Sight cover 10; Oil filter 11. Detailed Implementation

[0021] See Figure 1-7This utility model relates to an oil-circuit-integrated cooling tower gearbox, including a gearbox body 1, an input shaft 2, an intermediate shaft 3, and an output shaft 4. The gearbox body 1 has a first cavity 5 and a second cavity 6 that are interconnected. The input shaft 2, intermediate shaft 3, and output shaft 4 are arranged parallel to each other within the first cavity 1. The input shaft 2 and output shaft 4 are connected by a gear set. Both ends of the input shaft 2, intermediate shaft 3, and output shaft 4 are rotatably supported by bearings. The bearings located at the upper ends of the input shaft 2, intermediate shaft 3, and output shaft 4 are limited by a cover 7, which is fixed to the top mating surface 1.1 of the gearbox body 1. The upper end of the input shaft 2 extends out of the gearbox body 1 and connects to a drive motor. The drive motor is fixed to an input flange 8, which is also fixed to the gearbox body 1. The lower end of the input shaft 2 extends into the second cavity 6 and connects to a shaft head pump 9. The shaft head pump 9 is fixed to a partition plate 1.2 between the first cavity 5 and the second cavity 6. The oil filter 11 is fixed to the outer side of the gearbox 1. The gearbox 1 has a first connecting hole 1.3 and a second connecting hole 1.4 corresponding to the inlet and outlet of the oil filter 11, respectively. The first connecting hole 1.3 connects the outlet of the shaft pump 9 to the inlet of the oil filter 11. The second connecting hole 1.4 connects to the vertical connecting hole 1.5. The outlet of the vertical connecting hole 1.5 built into the gearbox 1 is located on the top mating surface 1.1 of the gearbox 1. The top mating surface 1.1 of the gearbox 1 has an oil groove 1.6 that communicates with the vertical connecting hole 1.5. The oil groove 1.6 has multiple outlets, each of which corresponds to a bearing seat hole. Since the cover 7 is placed on the top mating surface 1.1 of the gearbox 1, the oil groove 1.6 forms a sealed oil passage for distributing lubricating oil to each bearing (oil lubrication is mainly for lubricating the bearings at the upper end of each shaft; the bearings at the lower end of each shaft are immersed in the oil sump and do not require additional lubrication).

[0022] The outlet of the shaft pump 9 is connected to the inlet of the oil filter 11 through an internal oil pipe. To facilitate maintenance, the bottom of the second cavity 6 is sealed by a sight glass cover 10, which is fixed to the bottom surface of the gearbox 1.

[0023] The gearbox body 1 is an integral casting, and the first connecting hole 1.3, the second connecting hole 1.4 and the vertical connecting hole 1.5 are integrally cast using a pre-embedded sand core method.

[0024] The partition plate 1.2 has two functions: firstly, it is used for the installation and fixing of the lower bearings of the input shaft 2 and the intermediate shaft 3, which is equivalent to retracting the input shaft 2 and the intermediate shaft 3 into the gearbox 1 to reserve space for the installation of the shaft head pump 9; secondly, it is used for the installation of the shaft head pump 9.

[0025] Working principle: When the drive motor drives the input shaft to rotate, the shaft pump connected to the input shaft rotates along with it. The shaft pump draws the lubricating oil from the bottom of the gearbox through the oil filter to the vertical connecting hole, and then distributes it to each bearing through the internal oil groove.

[0026] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. An oil-in-line cooling tower reduction gearbox characterized by: The device includes a gearbox housing, which contains a first cavity and a second cavity that are interconnected. An input shaft, an intermediate shaft, and an output shaft are arranged in parallel within the first cavity. Both ends of the input shaft, intermediate shaft, and output shaft are rotatably supported by bearings. The lower end of the input shaft extends into the second cavity and connects to a shaft head pump. The shaft head pump is connected to an oil filter, which is fixed to the outer side of the gearbox housing. The gearbox housing has a first connecting hole and a second connecting hole corresponding to the inlet and outlet of the oil filter, respectively. The first connecting hole connects the outlet of the shaft head pump to the inlet of the oil filter. The second connecting hole connects to a vertical connecting hole, the outlet of which is located on the top mating surface of the gearbox housing. The top mating surface of the gearbox housing has an oil groove communicating with the vertical connecting hole, and the oil groove has multiple outlets.

2. An oil circuit built-in cooling tower reduction gearbox according to claim 1, characterized in that: The shaft pump, which is built into the second cavity, is fixed to the partition plate between the first cavity and the second cavity.

3. An oil circuit built-in cooling tower reduction gearbox according to claim 2, characterized in that: The partition plate is used for mounting and fixing the lower bearings of the input shaft and intermediate shaft. The partition plate retracts the input shaft and intermediate shaft into the gearbox to reserve space for installing the shaft head pump.

4. An oil circuit built-in cooling tower reduction gearbox according to claim 1, characterized in that: The bearings located at the upper ends of the input shaft, intermediate shaft, and output shaft are limited by the cover, which is fixed to the top mating surface of the gearbox.

5. An oil circuit built-in cooling tower reduction gearbox according to claim 4, characterized in that: The bottom surface of the tank cover forms a sealed oil passage with the oil trough.

6. An oil circuit built-in cooling tower reduction gearbox according to claim 1, characterized in that: The upper end of the input shaft extends out of the gearbox and connects to the drive motor. The drive motor is fixed on the input flange, and the input flange is fixed on the gearbox.

7. An oil circuit built-in cooling tower reduction gearbox according to claim 1, characterized in that: The bottom of the second cavity is sealed by a viewing cover, which is fixed to the bottom surface of the gearbox.

8. An oil circuit built-in cooling tower reduction gearbox according to claim 1, characterized in that: The gearbox body is an integral casting, and the first connecting hole, the second connecting hole and the vertical connecting hole are integrally cast using a pre-embedded sand core method.

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