Oil delivery pump
By setting up pressure regulating and pressure relief channels in the oil delivery pump, and combining this with gear shaft speed matching, the problem of gear shaft jamming caused by oil pressure difference was solved, achieving pressure balance and flexible adaptation to different working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU JIUYI MACHINERY
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-10
AI Technical Summary
The existing oil transfer pump has an excessive oil pressure difference at the inlet and outlet, which causes the gear shaft to jam, affecting normal operation.
The pump body's inlet and outlet are connected via a pressure regulating channel, which is also connected to the low-pressure space of the oil-using equipment. The gear shaft speed is set to match the oil-using equipment. The pressure regulating and pressure relief channels are used to balance the pressure inside the pump body and the oil-using equipment. The outlet size is smaller than the inlet size to meet the needs of the oil-using equipment.
It achieves pressure balance between the oil delivery pump and the oil-using equipment, avoids gear shaft jamming, flexibly adapts to different working conditions, requires no additional equipment, and has low cost.
Smart Images
Figure CN224107411U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of oil agent delivery, especially to an oil agent delivery pump. BACKGROUND
[0002] At present, many industrial equipment needs to use oil agent to maintain its normal operation, for example, air compressor, which needs lubricating oil to lubricate screw rod and other components during work, and the lubricating oil is provided to the air compressor through a delivery pump.
[0003] The delivery pump is connected with an external oil supply system, and the oil supply pressure of the oil supply system is usually greater than the required oil pressure of the oil-using equipment. In actual application, when the delivery pump pumps oil, a pressure difference is formed before and after the inlet and outlet due to the different oil pressures at the inlet and outlet, which may cause displacement of the gear shaft and thus cause jamming when the pressure difference is too large, resulting in that the delivery pump cannot operate normally. SUMMARY
[0004] Therefore, the utility model provides an oil agent delivery pump to balance the oil pressure at the inlet and outlet of the oil agent delivery pump and avoid the jamming of the gear shaft caused by excessive pressure difference.
[0005] To achieve the above-mentioned purpose, the utility model provides an oil agent delivery pump, which comprises a pump body and a gear shaft
[0006] The pump body comprises an oil inlet, an oil outlet and a pressure regulating channel, the oil inlet and the oil outlet are communicated through the pressure regulating channel, the oil outlet is communicated with the oil circuit of the oil-using equipment, and the pressure regulating channel is communicated with the low-pressure space of the oil-using equipment.
[0007] Preferably, the rotating speed of the gear shaft is matched with the operating speed of the oil-using equipment, the pressure regulating channel is communicated with the lowest pressure of the oil-using equipment, and the oil pressure of the oil outlet is adjusted to the required oil pressure of the oil-using equipment according to the rotating speed of the gear shaft.
[0008] Preferably, the pressure regulating channel comprises a first pressure relief channel, an oil cavity and a gear shaft channel, the oil cavity is communicated with the oil inlet and the oil outlet, the gear shaft channel is communicated with the oil cavity, the oil cavity is communicated with the first pressure relief channel, and the first pressure relief channel is communicated with the low-pressure space of the oil-using equipment.
[0009] Preferably, the gear shaft comprises a first gear shaft and a second gear shaft, the gears of the first gear shaft and the second gear shaft are engaged, and the first gear shaft is linked with the rotating shaft of the oil-using equipment.
[0010] Preferably, the pinion shaft channel comprises a second pinion shaft channel, which is communicated with the oil cavity through both ends of the second pinion shaft.
[0011] Preferably, the pinion shaft channel comprises a first pinion shaft channel, which comprises a main channel and a branch channel, the main channel is communicated with the oil cavity through the first end of the first pinion shaft, and the branch channel is communicated with the oil cavity through the side of the first pinion shaft, and the second end of the first pinion shaft is connected with the rotating shaft of the oil equipment.
[0012] Preferably, the pump body further comprises a pressure balance pipeline, one end of the pressure balance pipeline is communicated with the first pressure relief channel, and the other end of the pressure balance pipeline is communicated with a pressure relief port of the oil equipment, and the pressure relief port is located at the lowest pressure position in the internal space of the oil equipment.
[0013] Preferably, the pump body comprises an oil return channel, the pressure regulating channel comprises a second pressure relief channel, one end of the oil return channel is communicated with an oil passage of the oil equipment, the other end of the oil return channel is communicated with a bearing space of the first pinion shaft, the oil return channel is communicated with the second pressure relief channel, and the second pressure relief channel is communicated with the first pressure relief channel.
[0014] Preferably, the diameter of the oil outlet is smaller than the diameter of the oil inlet, and the oil outlet is connected with the oil equipment through a pipeline.
[0015] Preferably, the oil equipment comprises a screw compressor, the screw compressor comprises a compression cavity and an oil passage, the compression cavity is provided with a pressure relief port at the lowest pressure position, the oil passage is communicated with the oil outlet, the pressure relief port is communicated with the pressure regulating channel, and the oil passage is communicated with the compression cavity.
[0016] Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:
[0017] The oil inlet and the oil outlet of the pump body are communicated through the pressure regulating channel, the oil outlet is communicated with the low-pressure space of the oil equipment through the pressure regulating channel, and the oil passage of the oil equipment is communicated with the oil outlet, so that the pressure difference in the pump body and the pressure between the oil agent delivery pump and the oil equipment are balanced, and the gear shaft jamming problem caused by excessive pressure difference is avoided.
[0018] By matching the rotating speed of the gear shaft with the running speed of the oil equipment, the oil agent delivery pump can flexibly release pressure according to the actual running demand of the oil equipment, the oil equipment can automatically adapt to different pressure working conditions, no additional matching equipment is needed, the cost is low, and the pressure regulating mode is automatically flexible.
[0019] The pressure regulating channel comprises a first pressure relief channel, an oil cavity and a pinion shaft channel, the oil cavity is communicated with the oil inlet and outlet, the pinion shaft channel is communicated with the oil cavity to balance the oil pressure in the pump body, and the first pressure relief channel is communicated with the oil cavity and the low pressure space outside to realize pressure relief.
[0020] The pressure relief port of the oil equipment is arranged at the lowest pressure of the internal space, the first pressure relief channel and the pressure relief port are communicated through the pressure balance pipeline, the high pressure in the pump body is discharged to the lowest pressure, and the balancing efficiency is improved.
[0021] The size of the oil outlet is smaller than that of the oil inlet, the oil pressure at the oil outlet after pressure regulation still meets the demand of the oil equipment, and the normal operation of the oil equipment is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 is a perspective view of the oil agent delivery pump provided by the embodiment of the utility model.
[0023] Figure 2 is a sectional view of the oil agent delivery pump provided by the embodiment of the utility model.
[0024] The figure mark explanation: 1, pump body;12, oil outlet;13, pressure regulating channel;131, first pressure relief channel;132, oil cavity;133, first pinion shaft channel;134, second pinion shaft channel;135, second pressure relief channel;14, oil return channel. DETAILED DESCRIPTION
[0025] In order to more clearly understand the purpose, technical scheme and advantages of the utility model, the utility model is described and explained below in combination with drawings and embodiments. However, those skilled in the art should understand that the utility model can be implemented without these details. In some cases, in order to avoid unnecessary description and make the aspects of the utility model obscure, the well-known methods, processes, systems, components and / or circuits that have been described at a high level will not be described in detail. Those skilled in the art can obviously make various changes to the disclosed embodiments of the utility model, and the universal principles defined in the utility model can be applied to other embodiments and application scenarios without deviating from the principles and scope of the utility model. Therefore, the utility model is not limited to the shown embodiments, but conforms to the most extensive range consistent with the scope claimed by the utility model.
[0026] It should be noted that the description of these embodiments is used to help understand the application, but does not constitute a limitation on the application. In addition, the technical features involved in each embodiment of the application described below can be combined with each other as long as there is no conflict.
[0027] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described to the first, second, it is only used to distinguish the technical features for the purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.
[0028] In the description of the utility model, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a combined manner.
[0029] Please refer to Figure 1 and Figure 2 , the utility model embodiment discloses an oil agent delivery pump. The oil agent delivery pump includes pump body 1 and gear shaft 2, and the pump body 1 includes oil inlet (not shown in the drawing), oil outlet 12 and pressure regulating channel 13, and the position of oil inlet and oil outlet 12 is opposite, and the pressure regulating channel 13 is communicated with oil inlet and oil outlet 12 respectively, oil inlet is used to communicate with external oil supply system, and oil outlet 12 is used to communicate with the oil circuit inside the oil using equipment, and the pressure regulating channel 13 is communicated with the low pressure place of the internal space of the oil using equipment. When pumping oil, the oil agent delivery pump is connected in series through pressure regulating channel 13 at both ends of inlet and outlet, and is communicated with the low pressure place of the internal space of the oil using equipment through pressure regulating channel, so that the high pressure in the pump body 1 is released to the external low pressure space, the pressure balance between oil inlet and oil outlet is maintained, and the pressure balance between the oil agent delivery pump and the oil using equipment is directly maintained, so that the large pressure difference caused by gear shaft jamming phenomenon is avoided.
[0030] The existing oil using equipment is generally applied to specific working condition scene, if the working condition needs to be changed, the output oil pressure of the delivery pump also needs to be adjusted to adapt to the demand oil pressure of the oil using equipment under the new working condition. The existing adjustment mode of the output oil pressure of the delivery pump is to increase the corresponding matching equipment, such as adjustment controller and pressure reducing valve, at the output end according to the specific use working condition of the oil using equipment, which needs to increase material cost and labor cost, and needs to occupy additional space, and the adjustment mode is not flexible enough.
[0031] In the embodiment, the rotation speed of the oil agent delivery pump gear shaft 2 is set to match the running speed of the oil using equipment, the pressure regulating channel 13 is communicated with the lowest pressure of the oil using equipment, according to the rotation speed of the gear shaft 2, the pressure higher than the required oil pressure of the oil using equipment is discharged to the lowest pressure of the internal space of the oil using equipment through the pressure regulating channel 13, the oil outlet 12 is communicated with the oil circuit of the oil using equipment, and the oil circuit of the oil using equipment is communicated with the internal space, so that the pressure of the whole oil supply path is balanced, the pressure of the oil outlet 12 is automatically adjusted to the required oil pressure of the oil using equipment, the oil using equipment can automatically adapt to different oil pressure working conditions, the requirement of various working conditions is met, no additional matched inlet oil pressure limiting is needed, and cost is saved. In the embodiment, the rotation speed matching can be realized by mechanical linkage of the gear shaft and the rotating part of the oil using equipment. In other embodiments, the control system can be used to detect the running speed of the oil using equipment, and the gear shaft is controlled to rotate at the same running speed to realize the matching.
[0032] Specifically, as shown in Figure 2 The pressure regulating channel 13 includes a first pressure relief channel 131, an oil cavity 132 and a gear shaft channel. The oil cavity 132 is communicated with the oil inlet and the oil outlet 12. The gear shaft channel is communicated with the oil cavity 132. The first pressure relief channel 131 is communicated with the oil cavity 132. In the embodiment, the gear shaft 2 includes a first gear shaft 21 and a second gear shaft 22. The gears of the first gear shaft 21 and the second gear shaft 22 are engaged in the oil cavity 132. The first end of the first gear shaft 21 is located in the oil cavity 132, and the second end extends out of the pump body 1 to link with the rotating shaft of the oil using equipment. The two ends of the second gear shaft 22 are located in the oil cavity 132. The gear channel includes a first gear channel 133 and a second gear channel 134. The first gear channel 133 includes a main channel and a branch channel. The main channel is communicated with the oil cavity 132 through the first end of the first gear shaft 21. The branch channel is communicated with the oil cavity 132 through the side surface of the first gear shaft 21 near the second end of the first gear shaft 21. The second gear channel 134 is communicated with the oil cavity 132 through the two ends of the second gear shaft 22. Therefore, the inside of the oil cavity 132 is also communicated through the gear channel, which is beneficial to the rapid balance of the pressure in the pump body 1.
[0033] Specifically, the oil agent delivery pump further includes a pressure balance pipeline (not shown in the figure). One end of the pressure balance pipeline is communicated with the first pressure relief channel 131, and the other end is communicated with the pressure relief port of the oil using equipment. The pressure relief port of the oil using equipment is located at the lowest pressure of the internal space of the oil using equipment. By discharging the high pressure in the pump body 1 to the lowest pressure, the pressure balance is quickly maintained.
[0034] Specifically, as shown in Figure 2As shown, the pump body 1 further comprises an oil return channel 14, one end of the oil return channel 14 is communicated with the oil circuit of the oil equipment, the other end is communicated with the bearing space of the first gear shaft 21, the oil return channel 14 provides oil agent to the bearing, the pressure regulating channel 13 further comprises a second pressure relief channel 135, the oil return channel 14 is communicated with the second pressure relief channel 135, the second pressure relief channel 135 is communicated with the first pressure relief channel 131, so as to release the pressure of the oil return channel 14 and maintain pressure balance.
[0035] Specifically, the diameter size of the oil outlet 12 is larger than that of the oil inlet. In order to meet the oil pressure demand of the oil equipment, the minimum working pressure of the oil supply system is often greater than that of the oil equipment. In the embodiment, the size of the oil outlet 12 is reduced to increase the oil pressure of the oil outlet 12, so as to ensure that the oil pressure provided after pressure regulation can still meet the use requirements of the oil equipment.
[0036] Specifically, taking the screw compressor as an example, the screw compressor comprises a compression cavity and an oil circuit, the compression cavity is provided with a pressure relief port, the pressure relief port is located at the lowest pressure position of the compression cavity, the lowest pressure position can be the position where the screw tooth surface is just closed with the gas inlet and the gas is just compressed, at this time, the gas is just entering the compression cavity and is sealed in the tooth groove and has not started to be compressed, so it is the lowest pressure position. The oil circuit is communicated with the oil outlet 12, the pressure relief port is communicated with the first pressure relief channel 131, the oil circuit is communicated with the compression cavity, the screw of the screw compressor is linked with the gear shaft 2 through the transmission gear, so that the rotation speeds of the two are consistent. Assuming that the minimum working pressure of the external oil supply system is 10 bar, the required oil inlet pressure range of the screw compressor is 7-20 bar, at this time, the minimum value of the oil inlet pressure of the oil agent delivery pump is just greater than the required oil inlet pressure by 3 bar. The pressure regulating channel of the oil agent delivery pump is connected with the lowest pressure position in the screw compressor, and the pressure of the gas inlet of the screw compressor is the lowest, so the pressure of the oil outlet 12 can be set to be higher than that of the gas inlet by 3-5 KG, and the diameter size of the oil outlet 12 can be designed according to the pressure difference.
[0037] The above are preferred embodiments of the utility model, which do not limit the protection scope of the utility model, therefore: equivalent changes made on the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.
Claims
1. An oil delivery pump characterized in that: comprising a pump body (1) and a gear shaft (2); the pump body (1) comprises an oil inlet, an oil outlet (12) and a pressure regulating channel (13), the oil inlet and the oil outlet (12) are communicated through the pressure regulating channel (13), the oil outlet (12) is communicated with the oil circuit of the oil equipment, the pressure regulating channel (13) is communicated with the low pressure space of the oil equipment; the pressure regulating channel (13) regulates the pressure in the pump body (1) and delivers high pressure to the low pressure space of the oil equipment to balance the pressure between the oil delivery pump and the oil equipment. The rotating speed of the gear shaft (2) matches the running speed of the oil equipment, the pressure regulating channel (13) is communicated with the lowest pressure of the oil equipment, and the oil pressure of the oil outlet (12) is adjusted to the required oil pressure of the oil equipment according to the rotating speed of the gear shaft (2).
2. The oil delivery pump of claim 1, wherein: The pressure regulating channel (13) comprises a first pressure relief channel (131), an oil cavity (132) and a gear shaft channel, the oil cavity (132) is communicated with the oil inlet and the oil outlet (12), the gear shaft channel is communicated with the oil cavity (132), the oil cavity (132) is communicated with the first pressure relief channel (131), and the first pressure relief channel (131) is communicated with the low pressure space of the oil equipment.
3. The pump of claim 2, wherein: The gear shaft (2) comprises a first gear shaft (21) and a second gear shaft (22), the gears of the first gear shaft (21) and the second gear shaft (22) are engaged, and the first gear shaft (21) is linked with the rotating shaft of the oil equipment.
4. The pump of claim 3, wherein: The gear shaft channel comprises a second gear shaft channel (134), the second gear shaft channel (134) penetrates through both ends of the second gear shaft (22) and is communicated with the oil cavity (132).
5. The pump of claim 4, wherein: The gear shaft channel comprises a first gear shaft channel (133), the first gear shaft channel (133) comprises a main channel and a branch channel, the main channel penetrates through the first end of the first gear shaft (21) and is communicated with the oil cavity (132), the branch channel penetrates through the shaft side surface of the first gear shaft (21) and is communicated with the oil cavity (132), and the second end of the first gear shaft (21) extends out of the pump body (1) and is linked with the rotating shaft of the oil equipment.
6. The pump of claim 5, wherein: Further comprising a pressure balance pipeline, one end of the pressure balance pipeline is communicated with the first pressure relief channel (131), and the other end is communicated with a pressure relief port of the oil equipment, the pressure relief port is located at the lowest pressure position of the internal space of the oil equipment.
7. The pump of claim 3, wherein: The pump body (1) comprises an oil return channel (14), the pressure regulating channel (13) comprises a second pressure relief channel (135), one end of the oil return channel (14) is communicated with the oil circuit of the oil equipment, the other end is communicated with the bearing space of the first gear shaft (21), the oil return channel (14) is communicated with the second pressure relief channel (135), and the second pressure relief channel (135) is communicated with the first pressure relief channel (131).
8. The pump of claim 4, wherein: The diameter size of the oil outlet (12) is smaller than that of the oil inlet, and the oil outlet (12) is connected with the oil equipment through a pipeline.
9. The pump of claim 1, wherein: 10. The pump of any of claims 1-9, wherein: The oil using device comprises a screw compressor, the screw compressor comprises a compression cavity and an oil path, the compression cavity is provided with a pressure relief port at the lowest pressure position, the oil path is communicated with the oil outlet (12), the pressure relief port is communicated with the pressure regulating channel (13), the oil path is communicated with the compression cavity, and the gear shaft (2) is linked with a screw rod of the screw compressor.