Lubricant pumping device and lubricant pumping system
By combining a sealed chamber pressure pump and a pneumatic plunger pump, the design solves the problem of poor pumping performance of existing lubricating pumps for high-viscosity greases, achieving efficient and reliable lubricant pumping, and is suitable for a variety of lubricants.
Patent Information
- Application Number
- CN202520617690.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-04-02
AI Technical Summary
Existing lubrication pumps have poor pumping performance when dealing with highly viscous greases, and are prone to cavitation, making it difficult to meet the pumping requirements of high-viscosity lubricants.
The system employs a pressure-pumping method within a sealed chamber. Air is blown into the sealed chamber through the air inlet to increase the pressure, causing the lubricant in the oil tank to be discharged from the oil outlet pipe under pressure. Combined with the design of a pneumatic plunger pump and return oil pipe, efficient pumping is achieved.
It improves the pumping reliability and applicability of lubricants, making it suitable for lubricants with different properties, and reduces lubricant waste and equipment costs.
Smart Images
Figure CN223709286U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lubrication system technology, specifically relating to a lubricant pumping device and a lubricant pumping system equipped with the lubricant pumping device. Background Technology
[0002] An automatic lubrication system is a system used to provide timed and quantitative lubrication for mechanical equipment. It can reduce manual maintenance costs, improve equipment reliability and extend equipment life. It is widely used in fields such as mining, chemical industry, metallurgy, food, power, and coal. For example, belt conveyors generally need to be equipped with automatic lubrication systems.
[0003] Automatic lubrication systems typically include lubrication pumps, distributors, and reservoirs. The lubrication pump delivers grease or lubricating oil from the reservoir to the lubrication points, while the distributor evenly distributes the lubricant to each point. Currently, lubrication pumps are mainly plunger pumps and diaphragm pumps. These pumps exhibit high reliability with greases of relatively low viscosity, but they show poor pumping performance with more viscous greases, easily leading to pump cavitation due to difficulty in drawing the grease into the pump. Utility Model Content
[0004] This utility model relates to a lubricant pumping device and a lubricant pumping system equipped with the lubricant pumping device, which can at least solve some of the defects of the prior art.
[0005] This utility model relates to a lubricant pumping device, including a sealed chamber, an oil tank, and an oil outlet pipe. The oil tank is disposed in the sealed chamber, and an air inlet is provided on the sealed chamber. The oil outlet pipe passes through the sealed chamber and includes a first inner pipe section located inside the sealed chamber and a first outer pipe section located outside the sealed chamber. The first inner pipe section is inserted into the oil tank, and the first outer pipe section is provided with an oil outlet hole.
[0006] As one embodiment, an oil pressure plate is provided inside the oil drum, the oil pressure plate cooperates with a piston on the inner wall of the oil drum, and the first inner pipe section passes through the oil pressure plate and slides with the oil pressure plate.
[0007] As one embodiment, the lubricant pumping device further includes an oil return pipe. The oil outlet pipe includes a second indoor pipe section located inside the sealed chamber and a second outdoor pipe section located outside the sealed chamber. The second indoor pipe section is connected to the second outdoor pipe section. The second indoor pipe section is inserted into the oil tank. The second outdoor pipe section is provided with an oil return hole.
[0008] As one implementation method, the second indoor pipe section is sleeved outside the first indoor pipe section, and the annular cavity formed by the outer wall of the first indoor pipe section and the inner wall of the second indoor pipe section constitutes an oil return channel.
[0009] As one implementation method, the first outdoor pipe section is also connected to a pneumatic pump.
[0010] As one embodiment, the pneumatic pump is a pneumatic plunger pump, wherein a piston is provided in the first outdoor pipe section, and the piston is connected to the plunger of the pneumatic plunger pump.
[0011] As one implementation method, the sealed chamber is also provided with an exhaust port.
[0012] As one embodiment, the sealing chamber includes a sealing chamber base and a sealing chamber top cover, the sealing chamber top cover being detachably connected to the sealing chamber base.
[0013] As one embodiment, the upper cover of the sealing chamber is fastened to the base of the sealing chamber.
[0014] This utility model also relates to a lubricant pumping system, including the lubricant pumping device as described above, wherein the oil outlet is connected to a main oil supply pipe, and the main oil supply pipe is connected to multiple branch oil supply pipes, each branch oil supply pipe being used to connect to different lubrication points.
[0015] This utility model has at least the following beneficial effects:
[0016] This utility model provides a pumping device for pressurized pumping of lubricant. When air is blown into the sealed chamber through the air inlet, the pressure in the sealed chamber increases, and the lubricant in the oil tank is discharged from the oil outlet pipe under pressure. This pressurized pumping method has high reliability and wide applicability, and can meet the pumping needs of lubricants with different properties. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the structure of the lubricant pumping device provided in the embodiment of this utility model;
[0019] Figure 2 A schematic diagram of a lubricant pumping system provided in an embodiment of this utility model. Detailed Implementation
[0020] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0021] Example 1
[0022] like Figure 1 This utility model provides a lubricant pumping device 100, including a sealed chamber 1, an oil tank 2, and an oil outlet pipe 3. The oil tank 2 is disposed inside the sealed chamber 1, and an air inlet 13 is provided on the sealed chamber 1.
[0023] The oil outlet pipe 3 passes through the sealed chamber 1 and includes a first indoor pipe section 31 located inside the sealed chamber 1 and a first outdoor pipe section 32 located outside the sealed chamber 1. The first indoor pipe section 31 is inserted into the oil tank 2, and the first outdoor pipe section 32 is provided with an oil outlet hole 321.
[0024] The oil drum 2 mentioned above is used to store lubricants, such as grease or lubricating oil.
[0025] The air inlet 13 is used to connect a pressurized air source, including but not limited to compressed air, and an air inlet pipe can be connected to the air inlet 13.
[0026] The oil outlet 321 is used to deliver lubricant to the lubrication point, and an oil supply pipe can be connected to the oil outlet 321.
[0027] Based on the above-mentioned pumping device 100, when air is blown into the sealing chamber 1 through the air inlet 13, the pressure in the sealing chamber 1 increases, and the lubricant in the oil tank 2 is discharged from the oil outlet pipe 3 under pressure, thereby realizing the pumping of the lubricant.
[0028] In one embodiment, such as Figure 1 An oil pressure plate 21 is provided inside the oil drum 2. The oil pressure plate 21 is in cooperation with the piston on the inner wall of the oil drum 2. The first inner pipe section 31 passes through the oil pressure plate 21 and is in sliding cooperation with the oil pressure plate 21.
[0029] The oil pressure plate 21 is fitted with a piston on the inner wall of the oil drum 2. The oil pressure plate 21 is constructed as a piston that moves up and down in the oil drum 2. The outer ring wall of the oil pressure plate 21 is fitted with a clearance between the inner wall of the oil drum 2, so that the oil pressure plate 21 can move smoothly and at the same time, the lubricant in the oil drum 2 is prevented from overflowing from between the oil pressure plate 21 and the inner wall of the oil drum 2.
[0030] The oil outlet pipe 3 is preferably fixed in position, and the oil pressure plate 21 is slidably engaged with the first inner pipe section 31. Specifically, the oil pressure plate 21 can slide relative to the first inner pipe section 31. The oil pressure plate 21 is provided with a first mating hole, and the hole wall of the first mating hole is clearance-fitted with the outer wall of the first inner pipe section 31 so that the oil pressure plate 21 can move smoothly and at the same time prevent the lubricant in the oil tank 2 from overflowing from between the oil pressure plate 21 and the first inner pipe section 31.
[0031] By setting up the pressure plate 21, the pumping efficiency can be improved, and the lubricant in the oil tank 2 can be drawn more fully, reducing waste. Moreover, the pressure plate 21 also isolates the oil pressure gas from the oil circuit, preventing the phenomenon of backfiring due to air pressure.
[0032] When the inner wall of the oil drum 2 adopts a conical inner wall that is wider at the top and narrower at the bottom, the pumping efficiency and effect can be improved to a certain extent. Obviously, the outer ring wall structure of the pressure plate 21 is designed to match the structure of the inner wall of the oil drum 2.
[0033] The bottom end of the first indoor pipe section 31 is preferably close to the bottom of the oil tank 2, so that the lubricant in the oil tank 2 can be drawn more fully, while avoiding the phenomenon of the oil pressure plate 21 separating from the first indoor pipe section 31.
[0034] In one embodiment, the lubricant pumping device 100 further includes an oil return pipe 5, which includes a second indoor pipe section 51 located inside the sealed chamber 1 and a second outdoor pipe section 52 located outside the sealed chamber 1. The second indoor pipe section 51 is connected to the second outdoor pipe section 52. The second indoor pipe section 51 is inserted into the oil tank 2, and the second outdoor pipe section 52 is provided with an oil return hole.
[0035] The aforementioned oil return hole is used to receive the return oil from the lubrication point, and a main oil return pipe can be connected to this oil return hole.
[0036] In the case where a pressure plate 21 is provided, the second inner chamber pipe section 51 passes through the pressure plate 21 and slides in cooperation with it. Preferably, the return oil pipe 5 is fixed in position. Specifically, the pressure plate 21 and the second inner chamber pipe section 51 slide in cooperation, meaning the pressure plate 21 can slide relative to the second inner chamber pipe section 51. The pressure plate 21 has a second mating hole, and the wall of this second mating hole is clearance-fitted with the outer wall of the second inner chamber pipe section 51. This clearance allows the pressure plate 21 to move smoothly while preventing lubricant in the oil tank 2 from overflowing between the pressure plate 21 and the second inner chamber pipe section 51.
[0037] Preferably, such as Figure 1The second indoor pipe section 51 is fitted outside the first indoor pipe section 31, that is, the first indoor pipe section 31 is at least partially located inside the second indoor pipe section 51. The annular cavity formed by the outer wall of the first indoor pipe section 31 and the inner wall of the second indoor pipe section 51 serves as the oil return channel. In this scheme, the first mating hole and the second mating hole coincide, that is, only a mating hole for sliding fit with the second indoor pipe section 51 needs to be provided on the oil pressure plate 21, which can improve the smoothness of the movement and sealing of the oil pressure plate 21.
[0038] The second outdoor pipe section 52 is relatively independent from the first outdoor pipe section 32; optionally, such as Figure 1 The first outdoor pipe section 32 is coaxially connected to the first indoor pipe section 31; optionally, such as Figure 1 The axis of the second outdoor pipe section 52 is perpendicular to that of the second indoor pipe section 51.
[0039] The oil outlet pipe 3 is preferably sealed at its exit point from the sealing chamber 1 to improve the sealing performance of the sealing chamber 1; similarly, the oil return pipe 5 is preferably sealed at its exit point from the sealing chamber 1.
[0040] In one embodiment, such as Figure 1 The sealed chamber 1 is also provided with an exhaust port 14, which can be used to exhaust the sealed chamber 1 as needed. On the one hand, it can discharge the waste gas in the sealed chamber 1, and on the other hand, it can flexibly and accurately regulate the air pressure in the sealed chamber 1 with the help of the exhaust port 14.
[0041] In one embodiment, the sealing chamber 1 adopts a split, detachable, and modular structure, which allows for easy opening and closing of the sealing chamber 1 and facilitates maintenance operations such as replacing the oil drum 2. As a specific example of a split, detachable, and modular structure, such as... Figure 1 The sealing chamber 1 includes a sealing chamber base 12 and a sealing chamber top cover 11, with the sealing chamber top cover 11 detachably connected to the sealing chamber base 12.
[0042] The air inlet 13 can be located on the sealing chamber base 12 or on the sealing chamber top cover 11; the exhaust port 14 can be located on the sealing chamber base 12 or on the sealing chamber top cover 11.
[0043] Preferably, the connection between the sealing chamber cover 11 and the sealing chamber base 12 is sealed, including but not limited to measures such as inserting a sealing ring between the two.
[0044] Preferably, such as Figure 1 The upper cover 11 of the sealing chamber is fastened to the base 12 of the sealing chamber. Specifically, the upper cover 11 of the sealing chamber is sleeved with the base 12 of the sealing chamber, and the upper cover 11 of the sealing chamber covers and protects the top of the base 12 of the sealing chamber. This method facilitates the formation of the high-pressure sealing chamber 1 and also facilitates the opening and closing of the sealing chamber 1.
[0045] The sealed chamber cover 11 can be supported on a surrounding foundation by a bracket or similar means; optionally, such as Figure 1 A support 6 is provided around the base 12 of the sealing chamber. This support 6 can be an integral annular support surrounding the sealing chamber base 12, or a ring of support rods surrounding the sealing chamber base 12. The sealing chamber cover 11 is supported on the support 6 by several connectors spaced apart circumferentially along the circumference of the sealing chamber cover 11. The connectors can be screws screwed to the sealing chamber cover 11 or pins pinned to the sealing chamber cover 11, etc. In another embodiment, an annular lug can be provided on the outer wall of the sealing chamber base 12, and the bottom end of the sealing chamber cover 11 can be supported on the annular lug; or, by using the above-mentioned support 6 and lug coupling method, the structural stability of the sealing chamber cover 11 can be further improved.
[0046] In this case, a sealing ring can be sandwiched between the inner wall of the sealing chamber cover 11 and the outer wall of the sealing chamber base 12; in the case where an annular lug is provided on the sealing chamber base 12, a sealing ring can be sandwiched between the bottom end of the sealing chamber cover 11 and the annular lug. This sealing method has relatively higher sealing reliability.
[0047] In one embodiment, such as Figure 1 The aforementioned first outdoor pipe section 32 is also connected to a pneumatic pump 4 for extracting lubricant from the oil drum 2. This pneumatic pump 4 includes, but is not limited to, a pneumatic plunger pump. A piston is installed inside the first outdoor pipe section 32, connected to the plunger of the pneumatic plunger pump. The pneumatic plunger pump drives the piston to reciprocate within the first outdoor pipe section 32, creating a vacuum to draw oil from the oil drum 2. Based on this design, this embodiment features a pressure pumping mode (i.e., pushing lubricant by blowing air into the sealed chamber 1), a pneumatic pumping mode, and a dual-power pumping mode. It offers high operational flexibility, a wide range of applications, and can meet the pumping requirements of lubricants with different properties (e.g., viscosity).
[0048] Preferably, the pneumatic pump 4 is equipped with an air compressor for supplying compressed air to the pneumatic pump 4.
[0049] In one embodiment, the air compressor includes a compressor head and a pressure regulating controller, wherein the air outlet of the compressor head is connected to the air inlet 13 of the sealing chamber 1, and the air outlet 14 of the sealing chamber 1 is connected to the pressure regulating controller.
[0050] In this embodiment, a sealed chamber 1 is used instead of the air compressor's air tank, allowing the sealed chamber 1 to perform the function of air storage, which greatly reduces equipment costs. At the same time, maintaining a high-pressure environment in the sealed chamber 1 can improve the response speed of the oil pumping mode. In particular, the hot compressed gas discharged from the air compressor cylinder is stored in the sealed chamber 1, which can heat and soften the lubricant in the oil tank 2, giving the lubricant better fluidity and making it easier to pump out.
[0051] Optionally, the pressure of the hot compressed gas discharged from the air compressor cylinder is 0.6 to 0.8 MPa, and the temperature is in the range of 100 to 120°C; inside the sealed chamber 1, the pressure of the compressed air is maintained at 0.5 to 0.6 MPa, and the temperature is maintained in the range of 40 to 60°C.
[0052] Example 2
[0053] like Figure 2 This utility model provides a lubricant pumping system, including the lubricant pumping device 100 provided in the first embodiment above. The oil outlet 321 of the lubricant pumping device 100 is connected to an oil main pipe, and the oil main pipe is connected to a plurality of oil branch pipes 300, each of which is used to connect to different lubrication points.
[0054] In one embodiment, such as Figure 2 Each oil branch pipe 300 is equipped with a distribution valve 301 at its inlet to control the oil flow rate. The distribution valve 301 can be a solenoid valve; more preferably, it is a rotary valve, where the valve core completes the oil circuit switching during rotation, eliminating the need for the overflow function of the solenoid valve. This method avoids overflow contamination issues associated with the distribution valve 301.
[0055] Preferably, each oil branch pipe 300 is equipped with a leak detection mechanism, which can improve the reliability and safety of system operation. In one embodiment, a damping valve is provided at the end of the oil branch pipe 300. Lubricant can only enter the lubrication point through the damping valve if the oil pressure in the branch pipe is higher than the set pressure of the damping valve. The leak detection mechanism includes a flow detection unit and a pressure detection unit, which can be a flow meter, pressure gauge, etc. The flow and pressure in the branch pipe are detected by the flow detection unit and the pressure detection unit. If there is flow but no damping pressure, it indicates that there is a leak in the pipeline.
[0056] Preferably, such as Figure 2 The lubricant pumping system also includes a controller 200, wherein the lubricant pumping device 100, the distribution valve 301, etc., are all electrically or communicatively connected to the controller 200. Specifically, the electrical or communicative connection between the lubricant pumping device 100 and the controller 200 includes the connection between the air blowing device (used to blow air into the air inlet 13) and the controller 200, and the connection between the pneumatic pump 4 and the controller 200.
[0057] Example 3
[0058] This embodiment provides a belt conveyor, including a conveyor body and a lubricant pumping system for delivering lubricant to various lubrication points of the conveyor body.
[0059] Optionally, the lubricant pumping system may be the lubricant pumping system provided in Embodiment 2 above.
[0060] The lubrication points of the conveyor body include the bearing housings of each conveyor roller, and the lubricant used is preferably grease.
[0061] Currently, the grease used in belt conveyors is generally not recycled. The most common practice is to squeeze out the old grease from around the bearing end cover when new grease is injected into the bearing housing, thus replacing the old grease. However, this method easily causes environmental pollution from the grease. Therefore, this embodiment provides the following preferred solution:
[0062] An oil drain hole is provided on the bearing housing end cover. The oil drain hole is connected to a waste oil collection channel, and the waste oil collection channel is connected to a waste oil collection device 400.
[0063] The waste oil collection channel includes, but is not limited to, waste oil collection pipes or waste oil collection tanks, which extend from the oil drain hole to the waste oil collection device 400. The waste oil collection pipes / waste oil collection tanks can slope from the oil drain hole to the waste oil collection device 400 to facilitate the flow of lubricating grease.
[0064] The aforementioned waste oil collection device 400 includes, but is not limited to, oil receiving trays and recycling bins.
[0065] The bearing housing end cover is also provided with an oil inlet; optionally, the oil drain hole is located near the oil inlet.
[0066] In one embodiment, an oil detection unit is provided in the waste oil collection channel. This oil detection unit includes, but is not limited to, using an online grease analyzer, which can detect the quality of the lubricating grease online, so that the system can automatically or the operator can adjust the lubrication regime of the lubrication point.
[0067] In one embodiment, a blockage detection unit is provided in the waste oil collection channel, which includes, but is not limited to, a pressure gauge.
[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A lubricant pumping device, characterized in that, It includes a sealed chamber, an oil drum, and an oil outlet pipe. The oil drum is disposed in the sealed chamber and has an air inlet. The oil outlet pipe passes through the sealed chamber and includes a first inner pipe section located inside the sealed chamber and a first outer pipe section located outside the sealed chamber. The first inner pipe section is inserted into the oil drum, and the first outer pipe section has an oil outlet hole.
2. The lubricant pumping device as described in claim 1, characterized in that: An oil pressure plate is provided inside the oil drum. The oil pressure plate cooperates with a piston on the inner wall of the oil drum. The first inner pipe section passes through the oil pressure plate and slides in cooperation with the oil pressure plate.
3. The lubricant pumping device as described in claim 1, characterized in that: It also includes an oil return pipe, wherein the oil outlet pipe includes a second indoor pipe section located in the sealed chamber and a second outdoor pipe section located outside the sealed chamber. The second indoor pipe section is connected to the second outdoor pipe section, the second indoor pipe section is inserted into the oil drum, and the second outdoor pipe section is provided with an oil return hole.
4. The lubricant pumping device as described in claim 3, characterized in that: The second indoor pipe section is sleeved outside the first indoor pipe section, and the annular cavity formed by the outer wall of the first indoor pipe section and the inner wall of the second indoor pipe section constitutes an oil return channel.
5. The lubricant pumping device as described in claim 1, characterized in that: The first outdoor pipe section is also connected to a pneumatic pump.
6. The lubricant pumping device as described in claim 5, characterized in that: The pneumatic pump is a pneumatic plunger pump, wherein a piston is provided in the first outdoor pipe section, and the piston is connected to the plunger of the pneumatic plunger pump.
7. The lubricant pumping device as described in claim 1, characterized in that: The sealed chamber is also equipped with an exhaust port.
8. The lubricant pumping device as described in claim 1, characterized in that: The sealing chamber includes a sealing chamber base and a sealing chamber top cover, the sealing chamber top cover being detachably connected to the sealing chamber base.
9. The lubricant pumping device as described in claim 8, characterized in that: The upper cover of the sealing chamber is fastened to the base of the sealing chamber.
10. A lubricant pumping system, characterized in that: The device includes a lubricant pumping apparatus as described in any one of claims 1 to 9, wherein the oil outlet is connected to a main oil supply pipe, the main oil supply pipe is connected to a plurality of branch oil supply pipes, and each branch oil supply pipe is used to connect to different lubrication points.