A differential

Abstract

The utility model discloses a differential, comprising: a differential housing, with a pulley set arranged on the side; an input shaft arranged in the differential housing, with a through-going air outlet passage arranged in the middle; an exhaust valve arranged at the end of the input shaft and connected to the air outlet passage, and controlled to open and close by a control member; and a detection member for detecting the speed of the differential. The utility model is beneficial in that the exhaust valve opens to exhaust air when the working speed reaches the set speed, which ensures good heat dissipation during the working process of the differential and ensures that the seal is leak-free when the working stops.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a differential. Background Art

[0002] The differential is an important part of the horizontal screw centrifuge. The differential provides the relative speed between the screw conveyor and the drum, ensuring the feeding function of the screw conveyor. The differential is lubricated with grease or thin oil. During operation, the meshing and load of the gears (especially when overloaded) will gradually increase the temperature inside the differential. Long-term operation at high temperature greatly shortens the service life of the differential, and the lubricating oil (or grease) needs to be replaced frequently. In the prior art, a small hole is usually opened on the central shaft as an exhaust hole. Under the action of centrifugal force, when the differential is running, the central shaft is oil-free. The heat in the differential can be removed through the exhaust hole, which can significantly reduce the internal temperature of the differential. However, whenever the centrifuge stops or the speed becomes low, the centrifugal force cannot overcome gravity, and the oil inside the differential will leak out from the exhaust hole (the problem is more prominent when lubricated with thin oil), causing waste of lubricating oil or polluting the operating environment. The lost lubricating oil needs to be replenished before each restart, which is time-consuming and labor-intensive. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a differential, which facilitates heat dissipation while ensuring that the lubricating oil does not flow out of the differential. There is no need to replenish the lubricating oil inside the differential before starting, thereby reducing lubricating oil waste and environmental pollution, ensuring good heat dissipation during the working process of the differential, and ensuring that the seal is leak-free when stopping working.

[0004] Specifically, the utility model discloses a differential, comprising:

[0005] A differential housing with a pulley set on the side;

[0006] An input shaft is arranged in the differential housing and has a through-going air outlet passage in the middle;

[0007] An exhaust valve, arranged at the end of the input shaft and communicating with the exhaust passage, and controlled to open and close by a control member;

[0008] Detection component, used to detect the differential speed.

[0009] The utility model is beneficial in that the exhaust valve opens to exhaust air when the working speed reaches the set speed, thereby ensuring good heat dissipation during the working process of the differential and ensuring that the seal is leak-free when the working stops.

[0010] Furthermore, the exhaust valve includes a valve body, an exhaust port and a pressure regulating assembly, the valve body is detachably connected to the end of the input shaft, the exhaust port is communicated with the air outlet channel, and the pressure regulating assembly is connected to the valve body.

[0011] The utility model is beneficial in that the pressure regulating member adjusts the pressing force of the pressure member, and the exhaust valve is officially opened only when the internal gas heat pressure reaches a certain value, which can effectively prevent the exhaust valve from opening prematurely and prevent the lubricating oil from flowing out.

[0012] Furthermore, the pressure regulating assembly includes: a regulating block, in which a spring and a pressure piece installed at the end of the spring are arranged, the pressure piece contacts the internal channel of the valve body under the drive of the spring, and the regulating block is adjusted left and right on the valve body.

[0013] The utility model is beneficial in that the pressure piece blocks the exhaust port when driven by the spring, and after rotating for a period of time, the gas inside the differential expands due to heat, pushing the pressure piece to move, and the internal hot gas is discharged. After the heat is dissipated, it can automatically reset without manual operation.

[0014] Furthermore, a valve core is arranged in the valve body, and the control component is a solenoid valve, and the solenoid valve controls the opening and closing of the valve core.

[0015] The utility model is beneficial in that the electromagnetic valve automatically controls the opening and closing of the exhaust valve, thereby realizing automatic control without manual intervention.

[0016] Furthermore, the detection element is a speed sensor.

[0017] The utility model is beneficial in that the speed sensor is arranged to detect the rotation speed of the differential, and the solenoid valve is opened when the speed reaches a certain value, which is easy to install and low in cost.

[0018] Furthermore, the pulley assembly includes a main pulley and a secondary pulley, a cavity is provided between the main pulley and the input shaft, and the input shaft is provided with a branch channel connecting the cavity and the air outlet channel.

[0019] The utility model is beneficial in that the branch channel is arranged so that the cavity between the main pulley and the input shaft can also dissipate heat, thereby increasing the service life of the differential.

[0020] Furthermore, an output shaft is arranged on the side of the input shaft and connected via a gear set.

[0021] The utility model is beneficial in that the output shaft and the differential housing have different rotation speeds, which further drives the centrifuge drum and the screw conveyor to have different rotation speeds, thereby realizing centrifugation and slag discharge.

[0022] Furthermore, sealing rings are provided on the outer sides of the input shaft and the output shaft.

[0023] The utility model is beneficial in that the setting of the sealing ring effectively prevents the lubricating oil from flowing out, thereby reducing the loss of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments or the description of the prior art will be briefly introduced below.

[0025] Figure 1 This is the overall structure diagram of the differential of the utility model

[0026] Figure 2 This is an enlarged view of the utility model A

[0027] Figure 3 This is a schematic diagram of the connection between the exhaust valve and the control part of the utility model.

[0028] The reference numerals in the accompanying drawings are as follows:

[0029] Differential housing 1; main pulley 11; secondary pulley 12; input shaft 2; outlet channel 21; branch channel 22; sealing ring 23; exhaust valve 3; valve body 31; exhaust port 32; control member 4; adjustment block 5; spring 51; pressure member 52; detection member 6; output shaft 7. DETAILED DESCRIPTION

[0030] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0031] like Figure 1-3 As shown, the utility model discloses a differential, comprising:

[0032] The differential housing 1 has a pulley set on the side;

[0033] The input shaft 2 is arranged in the differential housing 1, and a through-going air outlet passage 21 is arranged in the middle;

[0034] An exhaust valve 3 is arranged at the end of the input shaft 2 and communicates with the exhaust passage 21, and is controlled to open and close by a control member 4;

[0035] The detection component 6 is used to detect the rotation speed of the differential.

[0036] The utility model is beneficial in that the exhaust valve 3 is opened to exhaust when the working speed reaches the set speed, which ensures good heat dissipation during the working process of the differential and ensures that the seal is leak-free when the working stops.

[0037] In some embodiments, the exhaust valve 3 includes a valve body 31, an exhaust port 32 and a pressure regulating assembly. The valve body 31 is detachably connected to the end of the input shaft 2. The exhaust port 32 is connected to the exhaust channel 21 through a threaded connection, and the pressure regulating assembly is connected to the valve body 31.

[0038] The pressure regulating assembly adjusts the pressing force of the pressure piece 52. Only when the internal gas heat pressure reaches a certain value, the exhaust valve 3 is officially opened, which can effectively prevent the exhaust valve 3 from opening prematurely.

[0039] In some embodiments, the pressure regulating assembly includes: a regulating block 5, a spring 51 and a pressure piece 52 installed at the end of the spring 51 are arranged inside the regulating block 5, the pressure piece 52 is spherical, and the pressure piece 52 contacts the internal channel of the valve body 31 under the drive of the spring 51 to block the air outlet channel 21, an internal thread is arranged inside the regulating block 5, and an external thread is arranged on the outside of the valve body 31. The regulating block 5 is adjusted left and right on the valve body 31 to adjust the pressing force of the pressure piece 52 on the air outlet channel 21. When the compression amount of the spring 51 is small, the gas inside the reducer can expand to push up the pressure piece 52. When the compression amount of the spring 51 is large, the gas inside the reducer needs to expand more and the pushing force is larger before exhaust and heat dissipation begin to prevent the valve from opening prematurely.

[0040] In some embodiments, a valve core is disposed in the valve body 31, and the control component 4 is a solenoid valve, which controls the opening and closing of the valve core. A connecting component is disposed between the valve body 31 and the air outlet channel 21, and a bearing is disposed between the valve body 31 and the connecting component. The valve body 31 does not rotate with the input shaft. The solenoid valve is disposed on the side of the valve body 31, and the valve is opened when power is turned on and closed when power is turned off.

[0041] The utility model is beneficial in that the electromagnetic valve automatically controls the opening and closing of the exhaust valve 3, thereby realizing automatic control without manual intervention.

[0042] Furthermore, the detection component 6 is a speed sensor, which is connected to a controller for controlling the opening and closing of the valve core to achieve automatic opening and closing control. The detection sensor is arranged on the side of the differential to sense and detect the differential speed. When the speed reaches the set value, the solenoid valve is opened. At this time, the lubricating oil will not flow out of the hole of the input shaft 2 due to the action of centrifugal force, and the internal air is discharged to achieve heat dissipation. When the centrifugal equipment is accidentally closed or the processing is completed, the differential speed is less than the set value. At this time, the solenoid valve controls the exhaust valve 3 to close to prevent the internal lubricating oil from flowing out. The control is convenient and the processing cost is low.

[0043] In some embodiments, the pulley group includes a main pulley 11 and a secondary pulley 12. A cavity is provided between the main pulley 11 and the input shaft 2. The input shaft 2 is provided with a branch channel 22 connecting the cavity and the outlet channel 21. During the processing, due to the high speed, the internal heat is generated, and heat dissipation is also required.

[0044] The utility model is beneficial in that the branch channel 22 is provided so that the cavity between the main pulley 11 and the input shaft 2 can also dissipate heat, thereby increasing the service life of the differential.

[0045] In some embodiments, the input shaft 2 is provided with an output shaft 7 connected by a gear set, so that the output shaft 7 and the differential housing 1 have different rotation speeds, further driving the centrifuge drum and the screw conveyor to rotate at different speeds, thereby achieving centrifugation and slag discharge.

[0046] Furthermore, sealing rings 23 are provided on the outside of the input shaft 2 and the output shaft 7 to effectively prevent the lubricating oil from flowing out and reduce the loss of lubricating oil.

[0047] During the working process, when the centrifuge is started, the differential speed is detected. When the speed reaches the set value, the exhaust valve 3 is opened, and the high-temperature gas inside the differential is discharged to achieve the heat dissipation function. The adjustable pressure regulating component can prevent the exhaust valve 3 from being opened too early. Only when the differential runs for a certain period of time and the internal air pressure is increased by heat, the pressure piece 52 is lifted and the exhaust valve 3 is officially opened; when the centrifuge is stopped or stopped unexpectedly, the exhaust valve 3 will automatically close. Effectively prevent the lubricating oil inside the differential from leaking from the outlet channel 21.

[0048] This application only requires technical transformation of the differential exhaust device without changing the internal structure of the differential, which is easy to implement and can even be used to perform on-site transformation on centrifuges that have already left the factory. It ensures good heat dissipation during the working process of the differential and ensures that the seal is leak-free when the differential stops working.

[0049] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A differential, characterized in that: include: A differential housing (1) is provided with a pulley set on the side; An input shaft (2) is arranged in the differential housing (1), and a through-going air outlet passage (21) is arranged in the middle thereof; An exhaust valve (3) is arranged at the end of the input shaft (2) and is in communication with the exhaust passage (21), and its opening and closing is controlled by a control member (4); The detection member (6) is used for detecting the rotation speed of the differential.

2. The differential according to claim 1, characterized in that: The exhaust valve (3) comprises a valve body (31), an exhaust port (32) and a pressure regulating assembly; the valve body (31) is detachably connected to the end of the input shaft (2); the exhaust port (32) is communicated with the exhaust passage (21); and the pressure regulating assembly is connected to the valve body (31).

3. The differential according to claim 2, characterized in that: The pressure regulating assembly comprises: a regulating block (5), wherein a spring (51) and a pressure piece (52) installed at the end of the spring (51) are arranged inside the regulating block (5), wherein the pressure piece (52) contacts the internal channel of the valve body (31) under the drive of the spring (51), and the regulating block (5) is adjusted left and right on the valve body (31).

4. The differential according to claim 3, characterized in that: A valve core is arranged in the valve body (31), and the control component (4) is a solenoid valve, which controls the opening and closing of the valve core.

5. The differential according to claim 1, characterized in that: The detection component (6) is a speed sensor.

6. The differential according to claim 1, characterized in that: The pulley assembly comprises a main pulley (11) and a secondary pulley (12), a cavity is provided between the main pulley (11) and the input shaft (2), and the input shaft (2) is provided with a branch channel (22) connecting the cavity and the outlet channel (21).

7. The differential according to claim 1, characterized in that: An output shaft (7) is arranged on the side of the input shaft (2) and is connected via a gear set.

8. The differential according to claim 7, characterized in that: Sealing rings (23) are provided on the outsides of the input shaft (2) and the output shaft.

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