Speed reducer lubricating oil control system based on forced oil injection lubrication

Abstract

A speed reducer lubricating oil control system based on forced oil injection lubrication relates to the field of speed reducer lubrication, the speed reducer comprises a box body and a gear transmission system arranged in the box body, an oil storage area used for storing lubricating oil is formed at the bottom of the box body, and a forced oil injection device is arranged on the upper portion of the box body. An oil conveying pipeline used for circulating lubricating oil in the oil storage area to the forced oil injection device is arranged outside the box body, a variable flow pump and a flow meter located on the downstream portion of the variable flow pump are arranged on the oil conveying pipeline, and the variable flow pump comprises a main gear pump and an auxiliary gear pump which work independently. The main gear pump is driven by one output shaft of the gear transmission system, and the auxiliary gear pump is driven by the auxiliary driving mechanism; the variable flow pump and the flow meter are both in signal connection with the control cabinet, the control cabinet can control the flow of the variable flow pump according to flow signals of the flow meter, the state of lubricating oil can be monitored in real time, and the lubrication effectiveness of the speed reducer is further improved.

Description

Technical Field

[0001] The utility model relates to the field of reducer lubrication, and particularly relates to a lubricating oil control system for a reducer based on forced oil injection lubrication. Background Art

[0002] As a kind of gearbox, a reducer (i.e., a reduction gearbox) has characteristics such as high smoothness, high reliability, and compact structure. Since the transmission system structure of the gear equipment in the reducer is complex and there are many transmission elements, once a fault occurs in the gears and bearings in the gear equipment, it will directly affect the normal operation of the equipment. In severe cases, it may even cause the entire mechanical system to fail, resulting in huge property losses and personal injuries. Effective lubrication is one of the keys to maintaining the long-term stable operation of the reducer.

[0003] During the lubrication process, insufficient lubricating oil will lead to problems such as gear gluing, bearing burnout, and excessive temperature rise, affecting the service life of the whole machine; excessive lubricating oil will increase costs, cause efficiency waste, and is prone to risks such as oil leakage. Therefore, it is very important to develop monitoring technologies for lubrication states.

[0004] Common lubrication methods for reducers include oil bath lubrication, general circulation lubrication, and forced oil injection lubrication. Oil bath lubrication uses the box body as an oil tank, containing a certain depth of lubricating oil in the oil tank, immersing the gears in the oil to a certain depth, and lubricating all parts of the gear transmission system by the oil splashed up when the gears rotate. This lubrication method mainly relies on natural convection and component movement to drive the lubricating oil circulation, and its cooling effect is relatively weak, especially in high-speed and heavy-load working conditions, it may not meet the requirements; general circulation lubrication pumps the lubricating oil from the oil return port of the gearbox back to the oil inlet; forced oil injection lubrication directly transports the lubricating oil from the oil return port of the gearbox to each lubrication point (tooth surface, spline, and bearing) with a pump.

[0005] Compared with oil bath lubrication, the cooling effects of general circulation lubrication and forced oil injection lubrication have been improved to varying degrees. However, due to the relatively simple oil bath lubrication and general circulation lubrication systems, mainly relying on the rotation of gears to drive the flow of lubricating oil, there are fewer fault points. The gearbox system using forced oil injection lubrication has high complexity, strict requirements for cleanliness, and great difficulty in operation and maintenance. Compared with the other two methods, it is more prone to problems such as lubrication failure and higher temperature rise. Therefore, higher requirements are placed on the lubrication effectiveness. Summary of the Utility Model

[0006] The utility model aims to provide a lubricating oil control system for a reducer based on forced oil injection lubrication to monitor the state of the lubricating oil in real time and further improve the lubrication effectiveness of the reducer.

[0007] To achieve the above object, the specific solution adopted by the present utility model is as follows: A lubricating oil control system for a speed reducer based on forced oil injection lubrication. The speed reducer includes a box body and a gear transmission system arranged inside the box body. An oil storage area for caching lubricating oil is formed at the bottom of the box body. A forced oil injection device is arranged at the upper part of the box body. An oil transmission pipeline for circulating the lubricating oil in the oil storage area to the forced oil injection device is arranged outside the box body. A variable flow pump and a flowmeter located downstream of the variable flow pump are arranged on the oil transmission pipeline. The variable flow pump includes a main gear pump and an auxiliary gear pump that work independently. The main gear pump is driven by an output shaft of the gear transmission system, and the auxiliary gear pump is driven by an auxiliary driving mechanism. The variable flow pump and the flowmeter are both signal-connected to a control cabinet, and the control cabinet can control the flow of the variable flow pump according to the flow signal of the flowmeter.

[0008] As a further optimization of the above technical solution: The inlet of the auxiliary gear pump is connected to an oil dilution station through an inlet branch pipe, and the outlet is connected in parallel to the oil transmission pipeline through an outlet branch pipe.

[0009] As a further optimization of the above technical solution: A cooling device for cooling the lubricating oil inside it is arranged on the oil transmission pipeline. The cooling device is located upstream of the variable flow pump and is signal-connected to the control cabinet.

[0010] As a further optimization of the above technical solution: The cooling device is a fan, a cooling fan or a heat exchanger.

[0011] As a further optimization of the above technical solution: A filter is arranged at the inlet of the oil transmission pipeline.

[0012] As a further optimization of the above technical solution: A temperature monitoring mechanism for monitoring the temperature inside it is arranged on the box body. The temperature monitoring mechanism is signal-connected to the control cabinet.

[0013] As a further optimization of the above technical solution: The flowmeter is a differential thermal flowmeter, a differential pressure flowmeter or an impeller flowmeter.

[0014] As a further optimization of the above technical solution: The housing of the main gear pump is fixed on the outside of the box body, and the housings of the auxiliary gear pump and the main gear pump are fixed.

[0015] As a further optimization of the above technical solution: The main gear pump includes a main pump body, a main pump front cover and a main pump rear gland. The main pump main gear is located inside the main pump body. The auxiliary gear pump includes an auxiliary pump body, an auxiliary pump front cover and an auxiliary pump rear gland. The auxiliary pump main gear is located inside the auxiliary pump body.

[0016] As a further optimization of the above technical solution: A control valve signal-connected to the control cabinet is arranged at the outlet of the main gear pump.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the utility model, one output shaft of the gear transmission system is drivingly connected with the driving gear of the main gear pump. When the speed reducer starts, the gear transmission system can drive the main gear pump to operate simultaneously, pumping out lubricating oil to forcibly spray oil to the gear transmission system. The operation of the speed reducer and the forced oil spray lubrication work simultaneously, avoiding the influence on the lubrication effectiveness caused by the delay in starting the oil transfer pump. At the same time, an auxiliary gear pump is arranged on one side of the main gear pump. When the lubricating oil quantity is insufficient, the auxiliary gear oil pump can be controlled to work to supplement the oil quantity in the oil transfer pipeline, so as to avoid the influence on the lubrication effectiveness caused by insufficient lubricating oil in the oil storage area.

[0019] During the lubrication design of the speed reducer gearbox, there is often a problem that the lubricating oil in the box body is pumped dry, resulting in empty oil in the oil transfer pipeline. The auxiliary gear oil pump is externally connected to the thin oil station for lubricating oil supplement, and can replenish oil when the oil quantity in the oil transfer pipeline decreases. A certain amount of lubricating oil supply is always guaranteed in the thin oil station. Therefore, the occurrence of the phenomenon that the lubricating oil in the box body is pumped dry is greatly reduced, and the influence on the lubrication effect caused by empty oil in the oil transfer pipeline is also avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the variable flow pump in the utility model;

[0021] Figure 2 is a schematic structural diagram of the control system of the utility model;

[0022] Reference numerals: 1, box body; 2, lubricating oil; 3, filter; 4, cooling device; 5, control cabinet; 6, industrial control room; 7, flowmeter; 8, temperature monitoring mechanism; 9, gear transmission system; 10, variable flow pump; 101, main gear pump, 1011, main pump front cover plate, 1012, main pump main gear, 1013, speed reducer output shaft, 1014, main pump rear gland, 1015, main pump pump body, 102, auxiliary gear pump, 1021, auxiliary pump front cover plate, 1022, auxiliary pump main gear, 1023, auxiliary motor output shaft, 1024, auxiliary drive motor, 1025, auxiliary pump sealed volume space, 1026, auxiliary pump rear gland, 1027, auxiliary pump pump body, 11, electrical signal; 12, oil transfer pipeline, 13, thin oil station. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solution of the present utility model will be further elaborated in detail below in conjunction with specific embodiments. For parts that are not detailedly recorded and disclosed in the following embodiments of the present utility model, they should all be understood as the prior art known or should be known to those skilled in the art, such as the driving method of the speed reducer, the structure of the forced oil injection device, the filter structure, the structure of the control cabinet, the signal connection method between the control cabinet and the flowmeter, the temperature monitoring mechanism, the auxiliary gear pump, the method for the control cabinet to control the fan, the variable flow pump, etc.

[0024] As Figure 2 shown, the present utility model discloses a lubricating oil control system for a speed reducer based on forced oil injection lubrication. The speed reducer includes a box body 1 and a gear transmission system 9 arranged inside the box body 1. A driving mechanism (such as a driving motor, which is not shown in the figure) is arranged outside the speed reducer to drive the speed reducer to operate. The power output shaft of the driving mechanism extends into the box body 1 as the input shaft of the gear transmission system 9, and the power is transmitted through the gear pair in the gear transmission mechanism and transmitted outside the box body 1. A forced oil injection device is arranged on the upper part of the box body 1. The forced oil injection device is used to convey the lubricating oil 2 for lubricating the speed reducer to each lubrication point inside the box body 1, such as tooth surfaces, splines, and bearings, etc., so as to perform forced lubrication on each lubrication point by means of forced oil injection. The specific structure of the forced oil injection device and its installation method inside the box body 1 are prior art; the lubricating oil 2 after lubricating each lubrication point falls to the bottom of the box body 1, and an oil storage area for caching the lubricating oil 2 is formed at the bottom of the box body 1.

[0025] An oil delivery pipeline 12 for circulating the lubricating oil 2 in the oil storage area to the forced oil injection device is arranged outside the box body 1. Specifically, an oil outlet for lubricating oil is provided on the box body 1, and the oil outlet for lubricating oil is located at the lower part of the side wall of the box body 1 or the bottom of the box body 1 to facilitate the discharge of the lubricating oil 2 in the oil storage area. The oil outlet for lubricating oil of the box body 1 is communicated with the oil inlet of the oil delivery pipeline 12, and the oil outlet of the oil delivery pipeline 12 is connected to the forced oil injection device to supply oil to the forced oil injection device.

[0026] A variable flow pump 10 and a flowmeter 7 located downstream of the variable flow pump 10 are arranged on the oil delivery pipeline 12. The flowmeter 7 is a commercially available flowmeter, such as a differential thermal flowmeter, a differential pressure flowmeter, or an impeller flowmeter.

[0027] As Figure 1 、 2 shown, the variable flow pump 10 includes a main gear pump 101 and an auxiliary gear pump 102 that work independently. The main gear pump 101 is fixed on the outer wall of the box body 1, and the auxiliary gear pump 102 is fixedly connected to the housing of the main gear pump 101. Specifically, the housing of the auxiliary gear pump 102 is fixed on the side of the main gear pump 101 opposite to the box body 1 in a threaded connection manner.

[0028] The gear transmission system 9 of the speed reducer transmits the power of the driving mechanism to the outside of the box body 1 through the output shaft. In this embodiment, there are two output shafts of the gear transmission system 9. One of the output shafts is the output shaft A, which serves as the input shaft of the main gear pump 101 to drive the driving gear of the main gear pump 101 and provide power for the operation of the main gear pump 101. The other is the output shaft B, which is connected to other target structures after extending from the box body 1 to provide power to the corresponding target mechanism.

[0029] The main gear pump 101 includes a main pump body 1015, a main pump front cover plate 1011 and a main pump rear gland 1014. The main pump main gear 1012 is arranged in the main pump and is driven by the speed reducer output shaft 1013 (i.e., the output shaft A). The oil inlet of the main gear pump 101 is connected to the oil outlet of the box body 1 through a pipeline, and the lubricating oil 2 in the oil storage area of the box body 1 is pumped into the forced oil injection device through the main gear pump 101.

[0030] In the present utility model, one of the output shafts of the gear transmission system 9 is in transmission connection with the driving gear of the main gear pump 101. When the speed reducer starts, the gear transmission system 9 can drive the main gear pump 101 to operate simultaneously, pump out the lubricating oil 2 to forcibly inject oil into the gear traditional system, and the operation of the speed reducer and the forced oil injection lubrication work are carried out simultaneously, avoiding the influence of the delay in starting the oil transfer pump on the lubrication effectiveness. However, since the driving gear of the main gear pump 101 is driven by the gear transmission system 9, it is no longer possible to adjust the speed of the driving gear in the main gear pump 101 through the control cabinet 5 to change the flow rate of the main gear pump 101. Therefore, a valve (not shown in the figure) signal-connected to the control cabinet 5 is provided at the oil outlet of the main gear pump 101, and the control cabinet 5 adjusts the flow rate of the main gear pump 101 by controlling the opening degree of the valve.

[0031] Continue to refer to Figure 1 , the auxiliary gear pump 102 is driven by an auxiliary driving mechanism. The auxiliary driving mechanism is a separately provided auxiliary driving motor 1024. The variable flow pump 10 and the flow meter 7 are both signal-connected to the control cabinet 5, and the control cabinet 5 can adjust the flow rate of the variable flow pump 10 according to the flow signal detected by the flow meter 7. When the flow meter 7 monitors that the flow rate in the oil transfer pipeline 12 is insufficient, the control cabinet 5 controls the auxiliary gear pump 102 to start, and pumps oil into the oil transfer pipeline 12 through the auxiliary gear pump 102 to supplement the lubricating oil 2.

[0032] The auxiliary gear pump 102 includes an auxiliary pump body 1027, an auxiliary pump front cover plate 1021 and an auxiliary pump rear gland 1026. The auxiliary pump body 1027, the auxiliary pump front cover plate 1021 and the auxiliary pump rear gland 1026 enclose an auxiliary pump sealed volume space 1025. The auxiliary gear pump 102 is arranged in the auxiliary pump sealed volume space 1025. The driving gear of the auxiliary gear pump 102 (i.e., the auxiliary pump main gear 1022) is driven by an auxiliary driving motor 1024. There is a transmission connection between the auxiliary driving motor 1024 and the auxiliary pump main gear 1022 through an auxiliary motor output shaft 1023. The oil inlet of the auxiliary gear pump 102 is connected to the thin oil station 19 through an oil inlet branch pipe, and the oil outlet is connected in parallel to the oil pipeline 12 through an oil outlet branch pipe. Through the auxiliary gear pump 102, the lubricating oil 2 in the thin oil station 19 can be pumped into the oil pipeline 12 and input into the forced oil injection device along the oil pipeline 12.

[0033] The auxiliary driving motor 1024 is signal-connected to the control cabinet 5. According to the flow signal detected by the flowmeter 7, the control cabinet 5 can adjust the rotation speed of the auxiliary driving motor 1024, so as to realize the start-stop and flow adjustment of the auxiliary gear pump 102.

[0034] It should be noted that the specific structures and threaded connection methods of the main gear pump 101 and the auxiliary gear pump 102 in the present utility model are exemplary. Other gear pump structures in the prior art can also be adopted, as long as it is ensured that the gear pump connected to the oil pipeline 12 is driven by the output shaft of the speed reducer, the auxiliary gear pump 102 is controlled by a separate driving motor and is provided with an independent thin oil station 19 as the lubricating oil source, and can timely supply oil to the forced oil injection device.

[0035] As another connection method of the auxiliary gear pump 102, the oil inlet of the auxiliary gear pump 102 is connected to the oil return area of the box body 1. The lubricating oil 2 in the oil return area is transported by the auxiliary gear pump 102 to supply oil to the forced oil injection device, so as to solve the problem that the flow rate of the main gear pump 101 is difficult to meet the oil demand of the forced oil injection device during some periods.

[0036] Since the lubricating oil 2 cached in the box body 1 has a certain temperature, directly using it for the forced oil injection device will affect the cooling effect on the gear transmission system 9. Therefore, a cooling device 4 for cooling the lubricating oil 2 therein is arranged on the oil pipeline 12. The cooling device 4 is located upstream of the variable flow pump 10 and is signal-connected to the control cabinet 5. The cooling device 4 is a fan, a cooling fan or a heat exchanger. The cooling device 4 in this embodiment is a fan. When the flowmeter 7 monitors that there is lubricating oil 2 passing through the oil pipeline 12, the flow signal is transmitted to the control cabinet 5, and the control cabinet 5 turns on the fan.

[0037] When the lubricating oil 2 in the box body 1 is circulated for forced oil spray lubrication, there may be some impurities, precipitation, etc. in the lubricating oil 2, which may affect the subsequent lubrication effect. In addition, forced oil spray lubrication has strict requirements on cleanliness and is difficult to operate and maintain. Therefore, a filter 3 is provided at the liquid inlet of the oil pipeline 12. The filter 3 is kept in a normally open state so that the lubricating oil 2 in the box body 1 can be filtered and then recycled.

[0038] The box 1 is provided with a temperature monitoring mechanism 8 for monitoring the temperature therein. The temperature monitoring mechanism 8 is connected to the control cabinet 5 by signal. The temperature monitoring mechanism 8 is a temperature sensor of the prior art, and the specific setting method is the prior art. The temperature monitoring mechanism 8 transmits the monitored temperature signal to the control cabinet 5. When the temperature in the box 1 is too high, the control cabinet 5 controls the fan gear adjustment, increases the fan speed, and cools down the lubricating oil in the oil pipeline 12.

[0039] In addition, it should be noted that in the oil pipeline 12 of the utility model, a one-way valve interface is provided at the connection with the filter 3, the variable flow pump 10, etc., which can ensure the accuracy of oil transmission and the sealing of the whole machine. The one-way valve is a commercially available product, and its connection method is the existing technology, which will not be repeated here.

[0040] The use process of the utility model is as follows: start the reducer, while the gear transmission system 9 of the reducer transmits power to the outside world through the output shaft B, the output shaft A drives the main gear pump 101 to run, and the lubricating oil 2 in the box body 1 is circulated and transported to the forced oil injection device for spraying, so as to force the box body 1 to be lubricated by oil injection. Generally, the lubrication state can be divided into four conditions according to the actual situation: no oil, poor oil flow, good flow and good flow. The control cabinet 5 is provided with indicator lights corresponding to these four conditions, namely no oil, poor, good and good. According to the flow signal detected by the flow meter 7, the corresponding indicator light is on. At the same time, the control cabinet 5 performs the following adjustments according to the signals of the flow meter 7 and the temperature monitoring mechanism 8:

[0041] (1) When the flow meter 7 detects that there is flow in the oil pipeline 12, the control cabinet 5 controls the cooling device 4 to start, and adjusts the cooling amplitude of the cooling device 4 according to the temperature monitored by the temperature monitoring mechanism 8;

[0042] Specifically, when the flow meter 7 detects that there is flow in the oil pipeline 12, a signal is transmitted to the control cabinet 5, and the control cabinet 5 controls the fan to start running. When the temperature monitoring mechanism 8 detects that the temperature exceeds the set value, a signal is transmitted to the control cabinet 5, and the control cabinet 5 increases the cooling amplitude of the cooling device 4. In this embodiment, the cooling amplitude of the cooling device 4 is increased by increasing the fan speed, wherein the set value is the temperature value when the box body 1 is operating normally and the lubrication state is good;

[0043] When the flowmeter 7 detects that there is flow in the oil pipeline 12 and the flow rate is lower than the set value, the control cabinet 5 controls the variable flow pump 10 to switch to the high-discharge mode, that is, increases the valve opening amplitude of the main gear pump 101 to increase the flow rate of the main gear pump 101. When the valve of the main gear pump 101 is fully open but the flow rate still cannot meet the lubrication requirement, the control auxiliary gear pump 102 to start and adjust the displacement of the auxiliary gear pump 102 according to the actual situation. The main gear pump 101 and the auxiliary gear pump 102 jointly supply oil to the oil pipeline 12;

[0044] (2) When the flowmeter 7 detects that there is no oil in the oil pipeline 12, it transmits an electrical signal 11 to the control cabinet 5. The control cabinet 5 gives an audible and visual alarm, lights up the indicator, and transmits this situation to the industrial control room 6 through the wireless GPRS network, so that the staff can take corresponding measures in time, such as replenishing the lubricating oil 2 or checking and detecting the fault point.

[0045] Since there is often a problem that the lubricating oil 2 in the box body 1 is pumped dry, resulting in empty oil in the oil pipeline 12 during the lubrication design of the reducer gearbox, an external thin oil station 19 is connected to the auxiliary gear oil pump to replenish the lubricating oil 2. Oil can be replenished when the oil volume in the oil pipeline 12 decreases. A certain lubricating oil 2 supply volume is always guaranteed in the thin oil station 19. Therefore, the occurrence of the phenomenon that the lubricating oil 2 is pumped dry is greatly reduced.

[0046] Through the lubricating oil control system of the present utility model, the lubricating oil in the oil pipeline 12 is monitored in real time, and the lubricating oil enters the forced oil injection device in a suitable flow rate, temperature and other states, so as to effectively lubricate the gearbox using forced oil injection lubrication.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reducer lubricating oil control system based on forced oil injection lubrication, the reducer comprising a housing (1) and a gear transmission system (9) arranged in the housing (1), an oil storage area for caching lubricating oil (2) is formed at the bottom of the housing (1), a forced oil injection device is arranged at the upper part of the housing (1), and an oil delivery pipeline (12) for circulating the lubricating oil (2) in the oil storage area to the forced oil injection device is arranged outside the housing (1), characterized in that: The oil delivery pipeline (12) is provided with a variable flow pump (10) and a flow meter (7) located downstream of the variable flow pump (10); the variable flow pump (10) comprises a main gear pump (101) and an auxiliary gear pump (102) which work independently of each other; the main gear pump (101) is driven by an output shaft of a gear transmission system (9), and the auxiliary gear pump (102) is driven by an auxiliary driving mechanism; the variable flow pump (10) and the flow meter (7) are both connected to a control cabinet (5) by signal; the control cabinet (5) can control the flow of the variable flow pump (10) according to the flow signal of the flow meter (7).

2. A reducer lubricating oil control system based on forced oil injection lubrication as claimed in claim 1, characterized in that: The oil inlet of the auxiliary gear pump (102) is connected to the oil dilution station (13) through an oil inlet branch pipe, and the oil outlet is connected in parallel to the oil delivery pipeline (12) through an oil outlet branch pipe.

3. A reducer lubricating oil control system based on forced oil injection lubrication as claimed in claim 1, characterized in that: The oil delivery pipeline (12) is provided with a cooling device (4) for cooling the lubricating oil therein. The cooling device (4) is located upstream of the variable flow pump (10) and is signal-connected to the control cabinet (5).

4. A reducer lubricating oil control system based on forced oil injection lubrication as claimed in claim 3, characterized in that: The cooling device (4) is a fan, an air cooler or a heat exchanger.

5. A reducer lubricating oil control system based on forced oil injection lubrication as claimed in claim 1, characterized in that: A filter (3) is provided at the liquid inlet of the oil delivery pipeline (12).

6. A reducer lubricating oil control system based on forced oil injection lubrication as claimed in claim 1, characterized in that: The box body (1) is provided with a temperature monitoring mechanism (8) for monitoring the temperature inside the box body, and the temperature monitoring mechanism (8) is connected to the control cabinet (5) by signal.

7. A reducer lubricating oil control system based on forced oil injection lubrication as claimed in claim 1, characterized in that: The flow meter (7) is a differential thermal flow meter, a differential pressure flow meter or an impeller flow meter.

8. A reducer lubricating oil control system based on forced oil injection lubrication as claimed in claim 1, characterized in that: The housing of the main gear pump (101) is fixed on the outside of the casing (1), and the housings of the auxiliary gear pump (102) and the main gear pump (101) are fixed.

9. A reducer lubricating oil control system based on forced oil injection lubrication as claimed in claim 1, characterized in that: The main gear pump (101) comprises a main pump body (1015), a main pump front cover plate (1011) and a main pump rear pressure cover (1014); the main pump main gear (1012) is located in the main pump body (1015); the auxiliary gear pump (102) comprises an auxiliary pump body (1027), an auxiliary pump front cover plate (1021) and an auxiliary pump rear pressure cover (1026); the auxiliary pump main gear (1022) is located in the auxiliary pump body (1027).

10. A reducer lubricating oil control system based on forced oil injection lubrication as claimed in claim 1, characterized in that: The oil outlet of the main gear pump (101) is provided with a control valve which is signal-connected to the control cabinet (5).

Images