Volumetric gear lubricating pump

Abstract

The utility model discloses a positive displacement gear lubricating pump which has the advantages of being simple in structure and capable of effectively reducing installation and machining requirements. The device comprises a driving motor, a pump seat, a mounting seat, an oil tank, a gear pump, an oil suction pipe and an oil outlet pipe, the pump seat is mounted above the oil tank and seals the oil tank, the mounting seat is mounted on the pump seat, the driving motor and the gear pump are mounted above and below the mounting seat respectively, and the driving motor is connected with the gear pump and drives the gear pump to operate. The gear pump is arranged in the oil tank, the first end of the oil suction pipe is communicated with an oil inlet of the gear pump, the second end of the oil suction pipe extends to the bottom of an inner cavity of the oil tank, and the first end of the oil outlet pipe is communicated with an oil outlet of the gear pump.

Description

Technical Field

[0001] The utility model relates to the field of lubricating pumps, in particular to a positive displacement gear lubricating pump. Background Art

[0002] Gear pumps have the advantages of simple structure, easy manufacturing, relatively low price and strong anti-pollution ability, and are often used as the oil supply device of the system in the lubrication system. Among them, the application of positive displacement gear lubricating pumps is becoming more and more extensive. The existing positive displacement gear lubricating pump includes a motor, a gear pump, a pump base and a fuel tank. The pump base is installed above the fuel tank to seal the fuel tank. The motor is installed on the pump base. The gear pump is arranged in the fuel tank. The motor is connected to the gear pump body through a transmission rod and a connector, and the motor drives the gear pump body to operate through the transmission rod to realize pumping oil. At present, the pump base and the connector need to be machined by cutting to ensure that the perpendicularity between the two meets the requirements, and the installation error between the two also needs to be controlled. Otherwise, it will have a certain impact on the operation of the gear pump. It can be seen that the structure of this positive displacement gear lubricating pump is complex, and the requirements for installation and processing are relatively high, which is not conducive to cost reduction, use and maintenance.

[0003] Therefore, there is an urgent need for a positive displacement gear lubricating pump that is simpler and can effectively reduce the requirements for installation and processing to overcome the above defects. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a positive displacement gear lubricating pump that is simpler and can effectively reduce the requirements for installation and processing.

[0005] To achieve the above purpose, the positive displacement gear lubricating pump provided by the utility model includes a driving motor, a pump base, a mounting seat, a fuel tank, a gear pump, a suction pipe and a discharge pipe. The pump base is installed above the fuel tank to seal the fuel tank. The mounting seat is installed on the pump base. The driving motor and the gear pump are respectively installed above and below the mounting seat. The driving motor is connected to the gear pump. The driving motor drives the gear pump to operate. The gear pump is arranged in the fuel tank. The first end of the suction pipe is communicated with the oil inlet of the gear pump. The second end of the suction pipe extends to the bottom of the inner cavity of the fuel tank. The first end of the discharge pipe is communicated with the oil outlet of the gear pump.

[0006] Preferably, the mounting seat is detachably installed on the pump base.

[0007] Preferably, a support foot is formed by protruding upward from the top of the mounting seat. The support foot passes through the pump base upward and supports the driving motor. The driving motor is fixed to the support foot.

[0008] Preferably, a central boss is formed by protruding upward from the top of the mounting seat. The central boss passes through the pump base upward.

[0009] Preferably, the output shaft of the driving motor is connected to the gear pump through a coupling.

[0010] Preferably, the bottom of the mounting seat protrudes downward to form a first mounting foot, an oil outlet channel is formed in the mounting seat, the oil outlet of the gear pump is connected to the oil outlet channel, a first mounting channel connected to the oil outlet channel is provided in the first mounting foot, the first end of the oil outlet pipe is installed in the first mounting channel, and a pressure relief valve for controlling the connection and disconnection of the oil outlet channel and the first mounting channel is installed in the oil outlet channel.

[0011] Preferably, the bottom of the mounting seat protrudes downward to form a second mounting foot, a second mounting channel communicating with the oil outlet channel is provided in the second mounting foot, and a safety valve is installed in the second mounting channel.

[0012] Preferably, the top of the mounting seat further protrudes upward to form a third mounting foot, and a third mounting channel communicating with the oil outlet channel is provided in the third mounting foot, and a pressure switch is installed in the third mounting channel.

[0013] Preferably, the positive displacement gear lubrication pump of the utility model further comprises an oil outlet joint installed on the top of the pump seat, the second end of the oil outlet pipe is connected to the oil outlet joint, and a pressure gauge is installed on the oil outlet joint.

[0014] Preferably, the positive displacement gear lubrication pump of the utility model further comprises a liquid level sensor installed on the pump seat and arranged in the oil tank, and a filter is installed at the second end of the oil suction pipe.

[0015] Compared with the prior art, in the utility model, the drive motor and the gear pump are respectively installed above and below the mounting seat, and the transmission rod and the connector are eliminated, making the structure simpler. Moreover, the drive motor and the gear pump are both installed with the mounting seat as the installation base point, which makes it easier to reduce installation errors and processing requirements, helps to reduce costs, and facilitates use and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereoscopic diagram of the volumetric gear lubrication pump of the utility model after the oil tank is separated.

[0017] Figure 2 It is a stereoscopic view of the volumetric gear lubrication pump of the utility model after the oil tank is hidden and the cover is arranged on the casing of the driving motor.

[0018] Figure 3 It is a stereoscopic diagram of the mounting seat of the utility model and a driving motor, a gear pump, a pressure relief valve, a safety valve and a pressure switch mounted on the mounting seat.

[0019] Figure 4 yes Figure 3 Bottom view of the structure shown.

[0020] Figure 5 is along Figure 4 The cross-sectional view obtained after cutting along the DD line segment.

[0021] Figure 6 This is a three-dimensional view when the pump base and the mounting base of the present utility model are assembled.

[0022] Figure 7 This is a three-dimensional view when the pump base and the mounting base of the present utility model are separated. Detailed implementation manners

[0023] In order to elaborate on the technical content and structural features of the present utility model in detail, the following further description is provided in conjunction with the implementation manners and with reference to the accompanying drawings.

[0024] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 and Figure 7 shown, the present utility model provides a positive displacement gear lubrication pump 100, which includes a driving motor 10, a pump base 20, a mounting base 30, an oil tank 40, a gear pump 50, a suction pipe 60, and a discharge pipe 70. The pump base 20 is installed above the oil tank 40 and seals the oil tank 40. The mounting base 30 is installed on the pump base 20. The driving motor 10 and the gear pump 50 are connected, and the driving motor 10 drives the gear pump 50 to operate for pumping oil. The gear pump 50 is disposed within the oil tank 40. The first end of the suction pipe 60 communicates with the inlet of the gear pump 50, and the second end of the suction pipe 60 extends to the bottom of the inner cavity of the oil tank 40. The first end of the discharge pipe 70 communicates with the outlet of the gear pump 50.

[0025] During operation, the driving motor 10 drives the gear pump 50 to operate. The oil in the oil tank 40 is pumped into the inlet of the gear pump 50 through the suction pipe 60. Then, the oil is pumped to the outlet of the gear pump 50, and finally, the pumped oil flows out through the discharge pipe 70 to achieve oil pumping.

[0026] In the present utility model, the driving motor 10 and the gear pump 50 are respectively installed above and below the mounting base 30, eliminating the drive rod and the connector, making the structure simpler. Moreover, both the driving motor 10 and the gear pump 50 are based on the mounting base 30 for installation, which is more conducive to reducing the installation error and the processing requirements, helping to reduce costs, and facilitating use and maintenance.

[0027] Preferably, the mounting base 30 is detachably installed on the pump base 20. In the embodiment provided by the present utility model, the mounting base 30 is installed on the pump base 20 using screws, but other methods such as snap-fasteners can also be adopted.

[0028] As Figure 2 、 Figure 3 、 Figure 6 and Figure 7As shown, a support leg 31 protrudes upward from the top of the mounting base 30. The support leg 31 passes upward through the pump base 20 and supports the drive motor 10, and the drive motor 10 is fixed to the support leg 31. The support leg 31 is generally columnar, and the support leg 31 passes through the pump base 20 by means of opening a hole in the pump base 20. The drive motor 10 is fixed to the support leg 31 by means of pin clamping.

[0029] Furthermore, a central boss 32 protrudes upward from the top of the mounting base 30. The central boss 32 passes upward through the pump base 20 to realize the mutual positioning of the mounting base 30 and the pump base 20. Preferably, the central boss 32 passes through the pump base 20 by means of opening a hole in the pump base 20. Preferably, the output shaft of the drive motor 10 passes through the central boss 32, and the output shaft of the drive motor 10 is connected to the gear pump 50 through a coupling.

[0030] As Figures 1 to 5 shown, a first mounting foot 33 protrudes downward from the bottom of the mounting base 30. An oil outlet flow channel 34 is formed in the mounting base 30. The oil outlet of the gear pump 50 is communicated with the oil outlet flow channel 34. A first mounting channel 331 communicated with the oil outlet flow channel 34 is provided in the first mounting foot 33. The first end of the oil outlet pipe 70 is mounted in the first mounting channel 331, and a pressure relief valve 332 for controlling the on-off of the oil outlet flow channel 34 and the first mounting channel 331 is provided in the oil outlet flow channel 34. When pumping oil, the oil output by the gear pump 50 has a certain pressure. When the oil is pumped into the oil outlet flow channel 34, the oil pushes open the pressure relief valve 332 ( Figure 5 in the direction of arrow A), and then the oil flows into the first mounting channel 331 and then flows out through the oil outlet pipe 70.

[0031] As Figures 1 to 5 shown, a second mounting foot 35 protrudes downward from the bottom of the mounting base 30. A second mounting channel 351 communicated with the oil outlet flow channel 34 is provided in the second mounting foot 35. A safety valve 352 is installed in the second mounting channel 351. The safety valve 352 opens when the oil pressure in the oil outlet flow channel 34 exceeds a preset value, so that the oil flows back into the fuel tank 40 to ensure safety. Preferably, the pressure of the safety valve 352 is adjustable.

[0032] As Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7As shown in the figure, a third mounting foot 36 protrudes upward from the top of the mounting base 30. A third mounting channel 361 communicating with the oil outlet channel 34 is provided inside the third mounting foot 36, and a pressure switch 362 is installed in the third mounting channel 361. When the pressure switch 362 detects that the pressure in the oil outlet channel 34 is greater than the preset value, for example, when the oil outlet is blocked, the lubricating pump 100 is controlled to stop, avoiding safety accidents caused by excessive oil pressure. In summary, the pressure relief valve 332, the safety valve 352, and the pressure switch 362 are all installed on the mounting base 30, and the gear pump 50 and the drive motor 10 are also installed on the mounting base 30. All the above-mentioned devices are based on the mounting base 30, which is beneficial to controlling production and installation errors and reducing processing and installation requirements.

[0033] As Figures 1 to 3 shown, the positive displacement gear lubricating pump 100 of the present invention further includes an oil outlet connector 80 installed on the top of the pump base 20. The second end of the oil outlet pipe 70 communicates with the oil outlet connector 80, and the oil outlet connector 80 is used to conveniently lead out the output oil. Preferably, a pressure gauge 81 is installed on the oil outlet connector 80, and the output oil pressure can be known by observing the pressure gauge 81.

[0034] As Figure 1 and Figure 2 shown, the positive displacement gear lubricating pump 100 of the present invention further includes a liquid level sensor 90 installed on the pump base 20 and disposed in the fuel tank 40. The liquid level sensor 90 alarms at a low liquid level to remind to add lubricating oil in time. An oil filling port is provided on the pump base 20.

[0035] As Figure 2 、 Figure 3 and Figure 4 shown, a filter 61 is installed at the second end of the oil suction pipe 60 to make the output oil more clean.

[0036] The working process of the positive displacement gear lubricating pump 100 of the present invention is briefly introduced as follows: The drive motor 10 drives the gear pump 50 to operate. The oil in the fuel tank 40 is pumped into the inlet of the gear pump 50 from the oil suction pipe 60. Then the oil is pumped to the outlet of the gear pump 50, and the oil is pumped into the oil outlet channel 34. The oil pushes open the pressure relief valve 332, and then the oil flows into the first mounting channel 331, and then flows into the oil outlet pipe 70, and finally flows out from the oil outlet connector 80. After shutdown, the pressure relief valve 332 resets (resets in the direction opposite to the A direction), and the oil flows back into the fuel tank 40 along the arrow B direction to realize pipeline pressure relief.

[0037] The above-disclosed are only the preferred examples of the present invention, and the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention all fall within the scope covered by the present invention.

Claims

1. A positive displacement gear lubrication pump, characterized in that: It includes a driving motor, a pump seat, a mounting seat, an oil tank, a gear pump, an oil suction pipe and an oil outlet pipe. The pump seat is installed above the oil tank and seals the oil tank. The mounting seat is installed on the pump seat. The driving motor and the gear pump are installed above and below the mounting seat respectively. The driving motor is connected to the gear pump, and the driving motor drives the gear pump to operate. The gear pump is arranged in the oil tank. The first end of the oil suction pipe is communicated with the oil inlet of the gear pump, the second end of the oil suction pipe extends to the bottom of the inner cavity of the oil tank, and the first end of the oil outlet pipe is communicated with the oil outlet of the gear pump.

2. The positive displacement gear lubrication pump according to claim 1, characterized in that: The mounting seat is detachably mounted on the pump seat.

3. The positive displacement gear lubrication pump according to claim 1, characterized in that: The top of the mounting seat protrudes upward to form a supporting foot, and the supporting foot passes through the pump seat upward and supports the driving motor, and the driving motor is fixed to the supporting foot.

4. The positive displacement gear lubrication pump according to claim 1, characterized in that: The top of the mounting seat protrudes upward to form a central boss, and the central boss passes through the pump seat upward.

5. The positive displacement gear lubrication pump according to claim 1, characterized in that: The output shaft of the driving motor is connected to the gear pump through a coupling.

6. The positive displacement gear lubrication pump according to claim 1, characterized in that: The bottom of the mounting seat protrudes downward to form a first mounting foot, an oil outlet passage is formed in the mounting seat, the oil outlet of the gear pump is connected to the oil outlet passage, a first mounting channel connected to the oil outlet passage is provided in the first mounting foot, the first end of the oil outlet pipe is installed in the first mounting channel, and a pressure relief valve for controlling the connection and disconnection of the oil outlet passage and the first mounting channel is installed in the oil outlet passage.

7. The positive displacement gear lubrication pump according to claim 6, characterized in that: The bottom of the mounting seat protrudes downward to form a second mounting foot, and a second mounting channel connected to the oil outlet channel is provided in the second mounting foot, and a safety valve is installed in the second mounting channel.

8. The positive displacement gear lubrication pump according to claim 6, characterized in that: The top of the mounting seat also protrudes upward to form a third mounting foot, and a third mounting channel connected to the oil outlet channel is provided in the third mounting foot, and a pressure switch is installed in the third mounting channel.

9. The positive displacement gear lubrication pump according to claim 1, characterized in that: It also includes an oil outlet joint installed on the top of the pump seat, the second end of the oil outlet pipe is connected to the oil outlet joint, and the oil outlet joint is installed with a pressure gauge.

10. The positive displacement gear lubrication pump according to claim 1, characterized in that: It also includes a liquid level sensor installed on the pump seat and arranged in the oil tank, and a filter is installed on the second end of the oil suction pipe.

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