CN220727080U - Lubricant supply system for gear box and gear box - Google Patents

Abstract

The utility model relates to a lubricant supply system (100) for a gearbox, comprising: a plurality of feed pumps (1) arranged in parallel, each feed pump (1) having a lubricant inlet (2) for communicating with a lubricant supply of the gearbox, a lubricant outlet (3) for communicating with a part of the gearbox to be lubricated, and a pump chamber (4) communicating the lubricant inlet (2) and the lubricant outlet (3); and a throttle pipe (7), the throttle pipe (7) connecting the plurality of feed pumps (1) in fluid communication, lubricant pumped by the feed pump (1) in normal operation being delivered to a communication point of the feed pump (1) in which suction occurs via the throttle pipe (7) to establish normal operation pressure when suction occurs in one or more of the feed pumps (1). The utility model also relates to a gearbox comprising a lubricant supply system. According to the utility model, through the arrangement of the throttle pipe, the suction of the feed pump can be eliminated, and the normal lubrication of the gear box is realized.

Description

Lubricant supply system for gear box and gear box

Technical Field

The present utility model relates to a lubricant supply system for a gear box and a gear box including the same.

Background

The development trend of wind power gearboxes is that the power is larger and larger, more new technologies are applied to the wind power gearboxes, and gearbox lubrication is one of the challenging designs. Since the gear box needs stable lubricating oil for lubrication and cooling at each operation stage, two or more pumps are needed to supply oil to the gear box at the same time in order to ensure enough lubricating oil quantity, if the phenomenon of 'empty suction' occurs in the pumps, the normal oil supply can not be realized, and the gear box can not normally obtain the required lubricating oil. Because the failure can not be monitored in the running process of the unit, the lubrication system and the running state of the gear box are deteriorated due to the fact that the gear box lacks of lubricating oil for a long time, and the transmission chain of the gear box is invalid in extreme cases.

At present, a multi-pump lubrication system of a wind power gear box needs to be filled with oil in a pump in advance, and if the gear box is not operated for a long time, the oil needs to be filled in the pump before operation. The disadvantage of this solution is that a lot of manpower and material resources are required to operate the lubrication system and to manage the process. Because the wind field can not monitor the problem, whether measures are in place can not be estimated in the process, and great risks are brought to the normal operation of the gearbox.

To this end, there is a need to devise an improved lubricant supply system for a gearbox that addresses one or more of the technical drawbacks described above.

Disclosure of Invention

To overcome at least one of the drawbacks of the prior art, the present utility model provides a lubricant supply system for a gearbox that eliminates pump suction.

According to one aspect of the present utility model, there is provided a lubricant supply system for a gear box, the lubricant supply system comprising:

a plurality of feed pumps arranged in parallel, each feed pump having a lubricant inlet for communicating with a lubricant supply of the gear box, a lubricant outlet for communicating with a portion of the gear box to be lubricated, and a pump chamber communicating the lubricant inlet and the lubricant outlet; and

a throttle tube connecting the plurality of feed pumps in fluid communication, lubricant pumped by the normally operating feed pump being delivered via the throttle tube to a communication point of the suction-appearing feed pump to establish a normal operating pressure when suction-appearing in one or more of the feed pumps.

According to one embodiment, the lubricant supply system has one of the following features:

the throttle pipe communicates the high-pressure areas of each feed pump with each other;

the throttle pipe communicates the low pressure areas of each feed pump with each other; or alternatively

The throttle pipe interconnects the high pressure region of one or more of the feed pumps with the low pressure region of the remaining feed pumps.

According to one embodiment, the lubricant supply system has one of the following features:

the throttle pipe interconnecting the plurality of feed pumps at or near the lubricant outlet of each feed pump;

the throttle pipe interconnecting the plurality of feed pumps at or near the lubricant inlet of each feed pump;

the throttle pipe interconnecting the plurality of feed pumps at or near the lubricant outlet of one or more of the feed pumps and at or near the lubricant inlet of the remaining feed pumps; or alternatively

The throttle tube communicates the plurality of feed pumps with one another at a pump body of each feed pump remote from the lubricant inlet and the lubricant outlet.

According to one embodiment, the cross-sectional area of the throttle pipe is less than 50% of the cross-sectional area of the lubricant inlet or the lubricant outlet of the connected feed pump near the connection.

According to one embodiment, the cross-sectional area of the throttle pipe is less than 10% of the cross-sectional area of the lubricant inlet or the lubricant outlet of the connected feed pump near the connection.

According to one embodiment, the throttle tube has one of the following features:

the throttle tube is formed as a flexible tube; or alternatively

The main body of the throttle pipe is made of a hard material and has a deformable portion connected to the main body for accommodating dynamic movement of the feed pump generated during operation, the deformable portion being formed at one end or both ends or an intermediate portion of the throttle pipe.

According to one embodiment, the throttle tube is connected to the feed pump directly by welding, snap-on or screw connection, or by a pipe connection.

According to one embodiment, the plurality of feed pumps are provided with separate restriction pipes between each other, or the plurality of feed pumps are provided with restriction pipes communicating with each other via a common joint.

According to one embodiment, the lubricant supply system further comprises a plurality of power sources, each supply pump being a supply pump driven by a respective power source, and/or the gearbox is a wind power gearbox.

According to another aspect of the present utility model there is provided a gearbox comprising the aforementioned lubricant supply system for a gearbox, the lubricant inlet of each supply pump being in communication with a lubricant supply of the gearbox, the lubricant outlet of each supply pump being in communication with a location of the gearbox to be lubricated.

The lubricant supply system according to the present utility model can establish a normal operation pressure by inputting lubricant to the suction supply pump by means of the normal operation supply pump when suction occurs to one or more supply pumps by providing the throttle pipe which communicates the plurality of supply pumps with each other, thereby eliminating suction of the supply pump, enabling the supply pump of the lubricant supply system to normally supply lubricant to the gear box, and reducing the risk of failure of the gear box.

Drawings

Other features and advantages of the present utility model will be apparent from the accompanying drawings and from the following description, which illustrate specific details of various embodiments according to the utility model.

FIG. 1 is a schematic partial perspective view of a lubricant supply system for a gearbox according to one embodiment of the utility model;

fig. 2 shows the internal configuration of a feed pump and the lubricant flow direction of the lubricant feed system for the gear box shown in fig. 1.

FIG. 3 shows a schematic configuration of a throttle tube of a lubricant supply system for a gearbox according to one embodiment of the utility model.

Detailed Description

Specific embodiments according to the present utility model and modifications thereof will be described in detail below with reference to the accompanying drawings.

For ease of description, spatially relative terms "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," and the like are used herein to define various components and their connection relationships. However, this is not limiting. These spatial relationships may also be reversed or altered when the placement orientation of the components is changed without affecting the scope of the present utility model.

FIG. 1 is a schematic partial perspective view of a lubricant supply system 100 for a gearbox (not shown) according to one embodiment of the utility model.

As shown in fig. 1, the lubricant supply system 100 includes two or more supply pumps 1 (only two supply pumps 1 are shown in fig. 1), and these supply pumps 1 are arranged in parallel. The parallelism here does not mean that the feed pumps 1 need to be arranged in parallel or parallel in physical space, but that the feed pumps 1 are mainly in parallel in the feed circuit of the lubricant. That is, each supply pump 1 sucks lubricant (e.g., lubricating oil, grease, etc.) from a lubricant supply portion of the gear box (e.g., an oil pan of the gear box), and then delivers the sucked lubricant to a portion to be lubricated of the gear box (e.g., a bearing, a gear, etc. inside the gear box). The lubricant supply system 100 is primarily intended for attachment to the housing of a gearbox on the outside of the gearbox, and is particularly suitable for attachment to a wind power gearbox on the outside. However, the lubricant supply system 100 may also be installed inside a gearbox or adapted to other types of gearboxes, where the interior space of the gearbox and the operating conditions allow.

In this lubricant supply system 100, each supply pump 1 is provided with a lubricant inlet 2, a lubricant outlet 3, and an internal pump chamber 4 (shown in fig. 2) communicating the lubricant inlet 2 and the lubricant outlet 3. The feed pump 1 may be connected with an inlet pipe 5 at the lubricant inlet 2, which inlet pipe 5 is intended to communicate to the lubricant supply in the gearbox. The feed pump 1 may be connected with an outlet pipe 6 at the lubricant outlet 3, which outlet pipe 6 is intended to communicate to the site to be lubricated in the gearbox. In one embodiment, the outlet pipe 6 is connected to a filter (not shown) to filter impurities or contaminants in the lubricant, which is then fed into the gearbox via a lubrication line.

A throttle pipe 7 is connected between the supply pumps 1 of the lubricant supply system 100. In the case where a suction phenomenon occurs in one or more of the feed pumps 1, the throttle pipe 7 delivers the lubricant sucked by the connected feed pump 1 operating normally to the connection point of the suction-occurring feed pump 1 and the throttle pipe 7, thereby assisting the suction-occurring feed pump 1 to achieve sealing and establishing the normal pressure required for operation. Accordingly, even if a failure such as suction of the supply pump occurs temporarily in the lubricant supply system 100, the lubricant is supplied through the throttle pipe 7 to assist the failure pump in returning to the normal operation pressure, and the lubricant can be supplied normally, thereby achieving normal lubrication of the gear box.

In one embodiment, a throttle pipe 7 is connected between each feed pump 1. For example, in the case where three feed pumps 1 are provided, the first feed pump is communicated to the second feed pump through the first throttle pipe, and the second feed pump is communicated to the third feed pump through the second throttle pipe. Thereby, the three feed pumps 1 communicate with each other through the two throttle pipes 7. However, it is conceivable that the feed pumps 1 can also communicate with each other by means of three throttle pipes 7 or that the three throttle pipes 7 communicate with each other by means of a common joint, for example a three-way valve. The above-described connection is equally applicable to the case of fewer or more feed pumps 1, and will not be described here again.

The throttle pipe 7 may be connected to the corresponding feed pump 1 at a plurality of locations on the feed pump 1. For example, one end of the throttle pipe 7 may be connected to the lubricant outlet 3 of one of the feed pumps 1 or near the lubricant outlet 3, and the other end is connected to the lubricant outlet 3 of the other feed pump 1 or near the lubricant outlet 3. Alternatively, one end of the throttle pipe 7 may be connected to the lubricant outlet 3 of one of the feed pumps 1 or near the lubricant outlet 3, while the other end is connected to the lubricant inlet 2 of the other feed pump 1 or near the lubricant inlet 2. Thus, the throttle pipe 7 may be connected at both ends to the lubricant inlet 2 or near the lubricant inlet 2 of each feed pump 1, to the lubricant outlet 3 or near the lubricant outlet 3 of each feed pump 1, and may be connected at one end to the lubricant inlet 2 or near the lubricant inlet 2 of one of the feed pumps 1 and at the other end to the lubricant outlet 3 or near the lubricant outlet 3 of the other feed pump 1.

Furthermore, the throttle pipe 7 is not limited to being connected only to the lubricant inlet 2 or the lubricant outlet 3 (or near the lubricant inlet 2 or the lubricant outlet 3) of each feed pump 1, but may be connected to the high-pressure region 8 or the low-pressure region 9 (shown in fig. 2) of each feed pump 1 at any suitable position.

Fig. 2 shows an internal configuration of the supply pump 1 by way of example of a gear pump. The feed pump 1 draws in lubricant from the gearbox at the lubricant inlet 2 (as indicated by the right arrow in fig. 2), forms a low pressure zone 9 in the vicinity of the lubricant inlet 2 (e.g. comprising from the lubricant inlet 2 to the point where the gears enter into engagement and a low pressure relief groove 10), forms a high pressure zone 8 in the vicinity of the lubricant outlet 3 (e.g. comprising from the point where the gears leave engagement to the lubricant outlet 3 and a high pressure relief groove 11) after pushing the lubricant via gear engagement, and the pressurized lubricant leaves the feed pump 1 from the lubricant outlet 3 (as indicated by the left arrow in fig. 2).

The throttle pipe 7 may communicate with the high-pressure region 8 or the low-pressure region 9 in the feed pump 1 at any other position than the lubricant inlet 2 or the lubricant outlet 3 of the feed pump 1, as long as the normal operating pressure can be established in the suction feed pump 1. For example, the throttle pipe 7 may communicate with the high-pressure relief groove 11 or the low-pressure relief groove 10 at a position near the high-pressure relief groove 11 or the low-pressure relief groove 10 of the pump body 13 of the feed pump 1. Alternatively, the throttle pipe 7 may be directly connected to the inlet pipe 5 or the outlet pipe 6 of the feed pump 1. Preferably, however, the throttle pipe 7 communicates the high-pressure region 8 of one of the feed pumps 1 with the high-pressure region 8 of the other feed pump 1, whereby lubricant can be rapidly fed to the communication point of the feed pump 1 where suction occurs by means of the high pressure of the high-pressure region 8 in the feed pump 1 operating normally, so that a pressure difference is rapidly formed between the suction feed pump 1 and the lubricant feed portion of the gear box, whereby lubricant is normally pumped.

Although the high-pressure area 8 and the low-pressure area 9 of the feed pump 1 are explained here by way of example of a gear pump, it is conceivable to a person skilled in the art that the feed pump 1 is not limited to a gear pump, but that other types of pumps such as a plunger pump, a screw pump, a vane pump, etc. may be used depending on the actual application scenario, etc. The supply pump 1 may be an electric pump or a mechanical pump. Each feed pump 1 may be driven in operation by a respective power source 16 (e.g., a motor as shown in fig. 1).

In order to reduce the influence of the throttle pipe 7 on the lubricant supply system 100 during normal operation, the cross-sectional area of the throttle pipe 7 is smaller than the cross-sectional area of the supply pump 1 connected to the throttle pipe 7 at the lubricant inlet 2 or the lubricant outlet 3 near the connection (or communication) of the throttle pipe 7. For example, the cross-sectional area of the throttle pipe 7 is smaller than 50%, preferably smaller than 40%, more preferably smaller than 30%, still more preferably smaller than 20%, most preferably smaller than 10% of the cross-sectional area of the lubricant inlet 2 or the lubricant outlet 3 near the connection (or communication) of the feed pump 1. Thus, even if there is a flow of lubricant in the throttle pipe 7 during normal operation, the influence of the flow of lubricant falls within the normal error range of the system operation.

Under operating conditions, dynamic displacement or dynamic angular deflection of the respective feed pump 1 to which the throttle pipe 7 is connected may occur. In order to reduce the influence of the dynamic movement of the feed pump 1, the throttle pipe 7 is preferably formed as a flexible pipe as a whole, both ends of which are connected to the feed pump 1 by pipe joints 14 (e.g., threaded pipe joints or snap pipe joints), as shown in fig. 1. For example, the throttle tube 7 may be formed as a hose, or in the form of a metal or plastic bellows.

However, as shown in fig. 3, the main body 15 of the throttle pipe 7 may be made of a metal material such as steel, aluminum, copper, or a hard plastic material, and at least a part connected to the main body 15 is formed as the deformable portion 12. The deformable portion 12 can be deformed to accommodate movement of the feed pump 1 without affecting the performance of the throttle tube 7 when dynamic movement of the feed pump 1 occurs. The deformable portion 12 may be formed at any position of the throttle pipe 7, for example, at an end portion (one end or preferably both ends) of the throttle pipe 7 or at an intermediate portion between both ends. Also, the throttle tube 7 may be formed with one or more deformable portions 12 depending on the operating conditions of the feed pump 1. The deformable portion 12 may be made of a deformable material, such as a flexible material, for example formed in the form of a hose or bellows.

The end of the throttle pipe 7 may be directly connected to the feed pump 1 by welding, snap-fit or screw connection, or may be connected to the feed pump 1 by a pipe joint 14 as shown in fig. 1.

In the utility model, by communicating the feed pumps 1 in the lubricant feed system 100 with each other through the throttle pipe 7, when suction occurs in one of the feed pumps 1, the lubricant of the feed pump 1 which is in normal operation and is communicated with the throttle pipe 7 is used for supplying the lubricant to the feed pump 1 which generates suction through the throttle pipe 7, so that the feed pump 1 is effectively sealed, thereby establishing normal operation pressure and normally supplying the lubricant to the gear box. Furthermore, the throttle tube 7 is able to equalize the pressure in the respective feed pump 1 lines during normal operation of the lubricant feed system 100, which is advantageous for maintaining a stable supply of lubricant to the gearbox by the lubricant feed system 100. Therefore, in the whole operation process of the gear box, the gear box parts can be fully lubricated and cooled, and the failure risk of the gear box is further reduced.

The specific embodiments according to the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the above specific structures, but encompasses various modifications and equivalent features. Various modifications may be made by those skilled in the art without departing from the scope of the utility model.

Claims (10)

1. A lubricant supply system (100) for a gearbox, the lubricant supply system (100) comprising:

a plurality of feed pumps (1) arranged in parallel, each feed pump (1) having a lubricant inlet (2) for communicating with a lubricant supply of the gearbox, a lubricant outlet (3) for communicating with a part of the gearbox to be lubricated, and a pump chamber (4) communicating the lubricant inlet (2) and the lubricant outlet (3); and

-a throttle pipe (7), said throttle pipe (7) connecting said plurality of feed pumps (1) in fluid communication, in case of suction of one or more of the feed pumps (1), lubricant sucked by the normally operating feed pump (1) being transported via said throttle pipe (7) to the connection point of the suction-appearing feed pump (1) for establishing a normal operating pressure.

2. The lubricant supply system (100) of claim 1, wherein the lubricant supply system (100) has one of the following features:

the throttle pipe (7) communicates the high-pressure areas (8) of each feed pump (1) with each other;

the throttle pipe (7) communicates the low-pressure areas (9) of each feed pump (1) with each other; or alternatively

The throttle pipe (7) communicates the high-pressure region (8) of one or more feed pumps (1) with the low-pressure region (9) of the remaining feed pumps (1).

3. The lubricant supply system (100) of claim 1, wherein the lubricant supply system (100) has one of the following features:

-said throttle pipe (7) interconnecting said plurality of feed pumps (1) at or near said lubricant outlet (3) of each feed pump (1);

-said throttle pipe (7) interconnecting said plurality of feed pumps (1) at said lubricant inlet (2) of each feed pump (1) or close to said lubricant inlet (2);

-said throttle pipe (7) interconnecting said plurality of feed pumps (1) at or near said lubricant outlet (3) of one or more feed pumps (1) and at or near said lubricant inlet (2) of the remaining feed pumps (1); or alternatively

The throttle pipe (7) communicates the plurality of feed pumps (1) with one another at a pump body (13) of each feed pump (1) remote from the lubricant inlet (2) and the lubricant outlet (3).

4. Lubricant supply system (100) according to claim 1, characterized in that the cross-sectional area of the throttle tube (7) is less than 50% of the cross-sectional area of the lubricant inlet (2) or the lubricant outlet (3) of the connected supply pump near the connection.

5. The lubricant supply system (100) according to claim 4, characterized in that the cross-sectional area of the throttle tube (7) is less than 10% of the cross-sectional area of the lubricant inlet (2) or the lubricant outlet (3) of the connected supply pump near the connection.

6. The lubricant supply system (100) according to any one of claims 1-5, wherein the throttle tube (7) has one of the following features:

the throttle tube (7) is formed as a flexible tube; or alternatively

The body (15) of the throttle tube (7) is made of a hard material and has a deformable portion (12) connected to the body (15) for accommodating dynamic movements of the feed pump (1) during operation, the deformable portion (12) being formed at one or both ends or an intermediate portion of the throttle tube (7).

7. Lubricant supply system (100) according to any of claims 1-5, characterized in that the throttle tube (7) is connected to the supply pump (1) directly by welding, snap-on or screw connection or to the supply pump (1) by a pipe connection (14).

8. Lubricant supply system (100) according to any of claims 1-5, characterized in that the plurality of supply pumps (1) are provided with separate restriction pipes (7) between each other or that the plurality of supply pumps (1) are provided with restriction pipes (7) communicating with each other via a common joint.

9. Lubricant supply system (100) according to any of claims 1-5, characterized in that the lubricant supply system (100) further comprises a plurality of power sources (16), each supply pump (1) being a supply pump driven by a respective power source (16), and/or that the gearbox is a wind power gearbox.

10. Gearbox, characterized in that it comprises a lubricant supply system (100) for a gearbox according to any of claims 1-9, the lubricant inlet (2) of each supply pump (1) being in communication with a lubricant supply of the gearbox, the lubricant outlet (3) of each supply pump (1) being in communication with a location of the gearbox to be lubricated.