Reduction gearbox gear oil cooling circulation device

Abstract

The utility model belongs to the technical field of engineering mechanical equipment, and provides a reduction gearbox gear oil cooling circulation device which comprises an oil suction pipe, a gear pump, an oil liquid distribution block, a plate type cooler, an oil liquid filter, a ball valve switch, a sensor and a connecting hose. The oil liquid distribution block is directly fixed above a reduction gearbox shell, the bottom of the oil liquid distribution block is tightly attached to the gear pump, the gear pump is connected with an oil suction pipe to be communicated with reduction gearbox oil liquid, an oil discharge port and an oil return port are formed in the top of the oil liquid distribution block, and the oil discharge port is connected with an oil inlet of the plate type cooler through an oil discharge hose. An oil outlet of the plate cooler is connected with an oil return port of the oil distribution block through an oil return hose; an input shaft of the gear pump is meshed with a spindle of the reduction gearbox through a gear pair; the cooling speed of the reduction gearbox can be adjusted in real time according to the rotating speed of the main shaft, temperature and pressure indexes are monitored in real time, timely alarming and shutdown are achieved, and equipment damage is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery equipment, and relates to the gear oil circulation of equipment reducers. Specifically, it is a gear oil cooling and circulation device for a reducer. Background Technique

[0002] As an important engineering machinery, roadheaders are widely used in operations such as mine exploitation and tunnel excavation. The cutting part, as its core working component, has a great influence on the working ability of the roadheader. Most of the cutting parts of roadheaders adopt planetary gear reducers, which have the advantages of compact structure, strong load-bearing capacity, and high transmission ratio. However, due to its compact structure, heat is concentrated, the heat dissipation area is small, and the temperature of the box body rises rapidly. As the main heat transfer and dissipation medium of the reducer, the gear oil will cause problems such as high-temperature aging and cracking of the sealing ring when its temperature is too high; the viscosity of the oil decreases, the oil film thickness is insufficient, and the lubrication effect becomes poor; the oxidation and deterioration process accelerates, and the service life is shortened. According to the statistics of the reducer maintenance data in the factory, the proportion of reducer failures caused by too high gear oil temperature exceeds 50%. Content of the Utility Model

[0003] The purpose of the utility model is to provide a gear oil cooling and circulation device for a reducer, which can adjust the heat dissipation speed of the reducer in real time according to the main shaft speed, and at the same time monitor the temperature and pressure indicators in real time, alarm and stop the machine in time to avoid equipment damage.

[0004] The technical solution adopted by the utility model to achieve the above purpose is:

[0005] A gear oil cooling and circulation device for a reducer includes an oil suction pipe, a gear pump, an oil distribution block, a plate cooler, an oil filter, a ball valve switch, sensors and connecting hoses; the oil distribution block is directly fixed above the reducer housing, the bottom of the oil distribution block is closely attached to the gear pump, the gear pump connects the oil suction pipe and the reducer oil to communicate, the top of the oil distribution block is provided with an oil discharge port and a return oil port, the oil discharge port is connected to the oil inlet of the plate cooler through an oil discharge hose, the oil outlet of the plate cooler is connected to the return oil port of the oil distribution block through a return oil hose, and the input shaft of the gear pump is meshed with the main shaft of the reducer through a gear pair.

[0006] Furthermore, an oil filter is also provided on the oil discharge hose between the oil discharge port of the oil distribution block and the plate cooler;

[0007] Furthermore, the sensors include a temperature transmitter and a pressure transmitter. The top of the oil distribution block is processed with transmitter fixing holes for connecting the temperature transmitter and the pressure transmitter, and the bottoms of the temperature transmitter and the pressure transmitter are directly connected to the inner cavity of the reducer.

[0008] Furthermore, a branch is connected beside the oil suction pipe in the oil distribution block, and a ball valve switch is connected to extract oil for convenient oil quality testing.

[0009] Further, a driving wheel is connected to the main shaft of the speed reducer, and a driven wheel is connected to the gear pump. The driving wheel meshes with the driven wheel.

[0010] Further, the driving wheel is axially positioned by the shoulder of the main shaft of the speed reducer and a retaining ring. The main shaft of the speed reducer transfers torque to the driving wheel through a first flat key. The driving wheel drives the driven wheel, and the driven wheel transfers torque to the input shaft of the gear pump through a second flat key.

[0011] The beneficial effects of the present utility model are as follows: The device can adjust the heat dissipation speed of the speed reducer in real time according to the main shaft speed. At the same time, temperature and pressure sensors are equipped to monitor temperature and pressure indicators at any time. When relevant indicators are abnormal, it will alarm and stop in time to avoid equipment damage. A ball valve switch is also provided in the bypass of the oil suction port of the device for regular extraction of oil for oil quality inspection on site. Description of the Drawings

[0012] Figure 1 is the structural diagram of the device of the present utility model;

[0013] Figure 2 is the schematic diagram of the device of the present utility model;

[0014] In the figure, 1 is oil; 2 is the main shaft of the speed reducer; 21 is the driving wheel; 22 is the first flat key; 23 is the retaining ring; 3 is the oil pump assembly; 31 is the oil suction pipe; 32 is the gear pump; 33 is the oil distribution block; 34 is the oil return hose; 35 is the oil discharge hose; 36 is the ball valve switch; 37 is the driven wheel; 38 is the temperature transmitter; 39 is the pressure transmitter; 4 is the speed reducer; 5 is the second flat key; 6 is the plate cooler; 61 is the cold water inlet; 62 is the cold water outlet; 7 is the oil filter. Detailed Embodiments

[0015] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0016] A speed reducer gear oil cooling and circulating device, as shown in Figure 1 and Figure 2As shown in the figure, a gear oil cooling and circulating device for a speed reducer includes an oil suction pipe 31, a gear pump 32, an oil distribution block 33, a plate cooler 6, an oil filter 7, a ball valve switch 36, a temperature transmitter 38, a pressure transmitter 39, and an oil return hose 34 and an oil discharge hose 35 for connection; the oil distribution block 33 is directly fixed above the housing of the speed reducer 4, used to connect and fix various components inside and outside the speed reducer 4. At the same time, the length of the hose connection is reduced, and the length of the external circulation path of the oil is reduced, minimizing the influence of the external environment temperature on the device; the bottom of the oil distribution block 33 is closely attached to the gear pump 32, and the contact surface of the middle step with the housing is sealed with an O-ring to prevent oil leakage; the oil suction port at the bottom of the gear pump 32 is welded with an oil suction pipe 31, and the oil suction pipe 31 bypasses the main shaft 2 of the speed reducer and is connected to the oil 1 inside the speed reducer 4. The suction force generated by the rotation of the impeller in the gear pump 32 causes the oil 1 to be sucked into the gear pump 32 through the oil suction pipe 31 and is output to the outside of the speed reducer 4 through the oil distribution block 33; the top of the oil distribution block 33 is provided with an oil discharge port and an oil return port. The oil discharge port is connected to the oil inlet of the plate cooler 6 through the oil discharge hose 35, and the oil outlet of the plate cooler 6 is connected to the oil return port of the oil distribution block 33 through the oil return hose 34. An oil filter 7 is also provided on the oil discharge hose 35 between the oil discharge port of the oil distribution block 33 and the plate cooler 6; the oil 1 is discharged from the speed reducer 4 after being filtered by the oil discharge hose 35 and the oil filter 7, passes through the plate cooler 6 and the oil filter 7, is filtered and cooled, and then is converted into low-temperature and clean oil, which is sent back to the speed reducer 4 through the oil return hose 34.

[0017] The input shaft of the gear pump 32 and the main shaft 2 of the speed reducer are meshed through a gear pair, and the displacement of the gear pump 32 can be adjusted following the rotation speed of the main shaft 2 of the speed reducer. The rated pressure and displacement of the gear pump 32 and the gear ratio of the gear pair are all strictly designed and calculated, so that the gear oil can stably maintain operation in the optimal working temperature range. When the motor speed increases and the system temperature rises faster, the displacement of the gear pump 32 will also increase accordingly, thereby accelerating the oil circulation and cooling speed, and ultimately being able to effectively ensure that the oil cooling rate is synchronized with the heating rate.

[0018] The top of the oil distribution block 33 is also machined with transmitter fixing holes for connecting the temperature transmitter 38 and the pressure transmitter 39. The bottoms of the temperature transmitter 38 and the pressure transmitter 39 are directly connected to the inner cavity of the speed reducer 4. The temperature transmitter 38 and the pressure transmitter 39 measure the values accurately and in a timely manner, and are transmitted to the electric control box through electrical signals. When the sensed values of the temperature transmitter 38 and the pressure transmitter 39 are abnormal, an alarm is given in a timely manner and the machine is stopped to avoid continuous operation under high temperature and high pressure conditions, causing damage to the equipment.

[0019] The oil suction pipe 31 in the oil distribution block 33 is connected to a branch line, which is connected to a ball valve switch 36 for extracting oil 1 for oil quality testing; when the device is in normal working state, the ball valve switch 36 remains closed to prevent dust, coal slime and other impurities from contaminating the pipeline. When it is necessary to extract part of the oil on site for oil quality testing, it is only necessary to unscrew the ball valve switch 36, and the oil can be pumped out from the branch line with the power of the gear pump 32 circulation, thereby improving the efficiency of liquid extraction and reducing pollution.

[0020] A driving wheel 21 is connected to the reduction box main shaft 2, and a driven wheel 37 is connected to the gear pump 32. The driving wheel 21 and the driven wheel 37 are meshed with each other through a gear pair. The driving wheel 21 is axially positioned by the shaft shoulder of the reduction box main shaft 2 and the retaining ring 23 to ensure that it has no axial movement and to ensure the stable meshing transmission efficiency of the gear pair. The reduction box main shaft 2 transmits the torque to the driving wheel 21 through the flat key 1 22, and the driving wheel 21 drives the driven wheel 37. The driven wheel 37 transmits the torque to the input shaft of the gear pump 32 through the flat key 2 5, thereby driving the impeller in the gear pump 32 to rotate, generating suction and pressure.

[0021] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A reduction gearbox gear oil cooling circulation device, characterized in that: It includes an oil suction pipe, a gear pump, an oil distribution block, a plate cooler, an oil filter, a ball valve switch, a sensor and a connecting hose; the oil distribution block is directly fixed on the top of the reduction gear box housing, the bottom of the oil distribution block is tightly fitted with the gear pump, the gear pump is connected to the oil suction pipe and is connected to the reduction gear box oil, an oil drain port and an oil return port are set on the top of the oil distribution block, the oil drain port is connected to the oil inlet of the plate cooler through an oil drain hose, the oil outlet of the plate cooler is connected to the oil return port of the oil distribution block through an oil return hose, and the input shaft of the gear pump is meshed with the main shaft of the reduction gear box through a gear pair.

2. A reduction gearbox gear oil cooling circulation device according to claim 1, characterized in that: An oil filter is also provided on the oil discharge hose between the oil discharge port of the oil distribution block and the plate cooler.

3. A reduction gearbox gear oil cooling circulation device according to claim 1, characterized in that: The sensor includes a temperature transmitter and a pressure transmitter. The top of the oil distribution block is processed with a transmitter fixing hole for connecting the temperature transmitter and the pressure transmitter. The bottom of the temperature transmitter and the pressure transmitter are directly connected to the inner cavity of the reducer.

4. A reduction gearbox gear oil cooling circulation device according to claim 1, characterized in that: The oil suction pipe in the oil distribution block is connected to a branch line and is connected to a ball valve switch for extracting oil to facilitate oil quality testing.

5. The reduction gearbox gear oil cooling circulation device according to claim 1, characterized in that: The main shaft of the reduction box is connected with a driving wheel, the gear pump is connected with a driven wheel, and the driving wheel is meshed with the driven wheel.

6. A reduction gearbox gear oil cooling circulation device according to claim 5, characterized in that: The driving wheel is axially positioned by the shoulder of the reduction gearbox main shaft and the retaining ring. The reduction gearbox main shaft transmits the torque to the driving wheel through the flat key 1, the driving wheel drives the driven wheel, and the driven wheel transmits the torque to the input shaft of the gear pump through the flat key 2.

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