CN217381534U

CN217381534U - Gear box

Info

Publication number: CN217381534U
Application number: CN202221123824.4U
Authority: CN
Inventors: 杜萍; 姬中晴; 刘增民; 钱刚; 陈金山
Original assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Current assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-09-06
Anticipated expiration: 2032-05-11

Abstract

The utility model discloses a gear box relates to extruder accessory technical field. The gear box comprises a box body and a circulating assembly. The oil inlet path and the oil return path are arranged on the box body, openings are formed in the inner walls of the first end and the second end of the box body, and oil is arranged in the box body; the circulating assembly comprises a circulating oil path and a pump body, two ends of the circulating oil path are respectively communicated with the oil inlet path and the oil return path, and the pump body is arranged on the circulating oil path. The gear box enables oil to fully lubricate and cool the bearing and the meshing point on the upper part of the gear box, and the service life is prolonged.

Description

Gear box

Technical Field

The utility model relates to an extruder accessory technical field especially relates to a gear box.

Background

The extruder belongs to one of the types of crushing machinery, and the extruder can fully plasticize and uniformly mix materials by means of pressure and shearing force generated by rotation of a screw rod, and the materials are molded through a neck mold. Extruders can be largely classified into twin-screw extruders, single-screw extruders, rare multi-screw extruders and screw-less extruders.

The single screw extruder has gear box with high power density, narrow inner space and high heat generating amount, and needs cooling equipment to ensure normal operation. Most of the gear boxes are vertically installed, a transmission shaft is located between a high-speed shaft and a low-speed shaft, the liquid level of oil in the gear boxes is generally located at the position of the transmission shaft, a bearing and a meshing point on the upper portion of the gear box cannot be directly lubricated and cooled, the lubrication and cooling at the position can be only carried out through the oil brought by the rotation of gears, the lubrication and cooling are insufficient, the failure of the gear box and the bearing is accelerated, and the service life is shortened.

In view of the above problems, it is necessary to develop a gearbox to solve the problem of low service life of the gearbox.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gear box makes fluid can lubricate and cool off increase of service life fully to bearing and the meshing point on gear box upper portion.

To achieve the purpose, the utility model adopts the following technical proposal:

a gearbox, comprising:

the oil inlet passage and the oil return passage are respectively provided with an opening on the inner wall of the first end and the inner wall of the second end of the box body, and oil is arranged in the box body;

the circulating assembly comprises a circulating oil path and a pump body, two ends of the circulating oil path are respectively communicated with the oil inlet path and the oil return path, and the pump body is arranged on the circulating oil path.

Preferably, the gear box still includes drive assembly, drive assembly including rotate set up in low-speed axle, high-speed axle and transmission shaft in the box, the transmission shaft respectively with the low-speed axle with the high-speed axle passes through gear engagement, the low-speed axle set up in first end, the high-speed axle set up in the second end, the one end of low-speed axle with the one end of high-speed axle all stretches out the box.

Preferably, the box body further comprises a drainage tube, one end of the drainage tube is communicated with the oil inlet path, and the other end of the drainage tube faces the gear teeth of the transmission shaft engaged with the high-speed shaft.

Preferably, the circulation assembly further includes a cooler provided on the circulation oil path, the cooler being configured to cool the oil of the circulation oil path.

Preferably, the circulation assembly further includes a filter provided on the circulation oil path, the filter being located upstream of the cooler.

Preferably, the circulation assembly further includes a temperature measuring part disposed on the circulation oil path, the temperature measuring part being configured to measure a temperature of the oil in the circulation oil path.

Preferably, the circulation assembly further includes a pressure measuring part disposed on the circulation oil path, the pressure measuring part being configured to measure a pressure of the oil in the circulation oil path.

Preferably, the box body is cast, and the oil inlet path and the oil return path are cast during casting.

Preferably, the circulating assembly is fixedly arranged on the mounting piece, the mounting piece is detachably connected with the box body, and the relative angle between the mounting piece and the box body is adjustable.

Preferably, the mounting member is provided with a plurality of mounting holes, and the positions of the plurality of mounting holes are centrosymmetric with respect to the center of the mounting member.

The utility model has the advantages that:

the utility model provides a gear box. The spatial positions of the first end and the second end of the gear box can be interchanged, so that the installation requirement of the relative position of the input shaft and the output shaft when the gear box is vertically installed is met, and the applicability of the gear box is improved. When the installation, the inside fluid of gear box is located the bottom, no matter first end or second end are the bottom, and the pump body can both be with fluid pump to the top to inside flowing into the gear box through corresponding opening, make fluid can lubricate and cool off the bearing and the meshing point on gear box upper portion fully, increase of service life.

Drawings

FIG. 1 is a cross-sectional view of a first end of a gear box provided by the present invention as a bottom end;

FIG. 2 is a cross-sectional view of the second end of the gear box provided by the present invention as a bottom end;

fig. 3 is a schematic structural diagram of the circulation assembly and the mounting member according to the present invention.

In the figure:

1. a box body; 2. a circulation component; 3. a transmission assembly; 4. a mounting member;

11. a first end; 12. a second end; 13. a first oil inlet path; 14. a first oil return path; 15. a second oil inlet path; 16. a second oil return path; 21. a pump body; 22. a cooler; 23. a filter; 24. a temperature measuring member; 25. a pressure measurement member; 31. a low speed shaft; 32. a high speed shaft; 33. a drive shaft; 34. a bearing; 41. and (7) installing holes.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The gear box of the single-screw extruder has high power density, narrow internal space and high heat productivity, and cooling equipment is required to be added for cooling so as to ensure normal operation. Most occasions of the gear box are vertical installation, the gear box is limited by installation environment, an output shaft of the gear box can be arranged below an input shaft or above the input shaft, and the form of the gear box needs to be selected according to actual conditions. The liquid level of the oil in the gear box is generally positioned at the position of the transmission shaft, so that the bearing and the meshing point positioned on the upper part of the gear box cannot be directly lubricated and cooled, the lubrication and the cooling at the position can only be carried out through the oil brought up when the gear rotates, the lubrication and the cooling are insufficient, the failure of the gear box and the bearing is accelerated, and the service life is prolonged.

To solve the above problems, the present embodiment provides a gear box. As shown in fig. 1-3, the gear box includes a box body 1 and a circulation assembly 2, the box body 1 is provided with an oil inlet path and an oil return path, the oil inlet path and the oil return path are provided with openings on inner walls of the box body 1 at a first end 11 and a second end 12, the box body 1 is provided with oil inside, the circulation assembly 2 includes a circulation oil path and a pump body 21, two ends of the circulation oil path are respectively communicated with the oil inlet path and the oil return path, and the pump body 21 is disposed on the circulation oil path.

The spatial positions of the first end 11 and the second end 12 of the gear box can be interchanged, so that the installation requirement of the relative position of the input shaft and the output shaft when the gear box is vertically installed is met, and the applicability of the gear box is improved. When the installation, the inside fluid of gear box is located the bottom, no matter first end 11 or second end 12 are the bottom, and the pump body 21 can both be with fluid pump to the top to inside flowing into the gear box through corresponding opening, make fluid can lubricate and cool off gear box upper portion's bearing and meshing point fully, increase of service life.

As shown in fig. 1, when the first end 11 is a bottom end, the pump body 21 can pump oil into the oil inlet path and flow out from an opening of the oil inlet path at the second end 12. As shown in fig. 2, when the second end 12 is a bottom end, the pump body 21 can pump oil into the oil inlet path and flow out from an opening of the oil inlet path at the first end 11.

As shown in fig. 1 and 2, the oil inlet path includes a first oil inlet path 13 and a second oil inlet path 15, and the oil return path includes a first oil return path 14 and a second oil return path 16. The first oil inlet channel 13 and the first oil return channel 14 are both disposed on the inner wall of the first end 11 of the box 1 and open to the first end 11 of the box 1, and the second oil inlet channel 15 and the second oil return channel 16 are both disposed on the inner wall of the second end 12 of the box 1 and open to the second end 12 of the box 1.

The oil inlet and oil return paths at the two ends are separately arranged, when the first end 11 is the bottom end, the circulating oil path is respectively communicated with the first oil return path 14 and the second oil return path 15, and the first oil inlet path 13 and the second oil return path 16 are simultaneously sealed, so that the oil can flow out through an opening in the inner wall of the second end 12 of the second oil inlet path 15 after sequentially passing through the first oil return path 14, the circulating oil path and the second oil inlet path 15, and the meshing point of the second end 12 and the bearing are lubricated and cooled.

Similarly, when the second end 12 is the bottom end, the circulating oil path communicates with the second oil return path 16 and the first oil return path 13 respectively, and simultaneously plugs the second oil return path 15 and the first oil return path 14, so that the oil can flow out through the opening of the inner wall of the first end 11 of the first oil return path 13 after passing through the second oil return path 16, the circulating oil path and the first oil return path 13 in sequence, and lubricate and cool the meshing point of the first end 11 and the bearing 34.

As shown in fig. 1 and 2, the gearbox further includes a transmission assembly 3, the transmission assembly 3 includes a low-speed shaft 31, a high-speed shaft 32 and a transmission shaft 33 rotatably disposed in the casing 1, the transmission shaft 33 is engaged with the low-speed shaft 31 and the high-speed shaft 32 through gears, the low-speed shaft 31 is disposed at the first end 11, the high-speed shaft 32 is disposed at the second end 12, and one end of the low-speed shaft 31 and one end of the high-speed shaft 32 both extend out of the casing 1. Bearings 34 are arranged between the low-speed shaft 31, the high-speed shaft 32 and the transmission shaft 33 and the box body 1, the bearings 34 can support the low-speed shaft 31, the high-speed shaft 32 and the transmission shaft 33, the friction resistance of the low-speed shaft 31, the high-speed shaft 32 and the transmission shaft 33 in the rotating process is reduced, meanwhile, the abrasion of the low-speed shaft 31, the high-speed shaft 32 and the transmission shaft 33 is reduced, and the rotating precision of the low-speed shaft 31, the high-speed shaft 32 and the transmission shaft 33 is guaranteed.

The low-speed shaft 31, the high-speed shaft 32 and the transmission shaft 33 are all sleeved with gears or are circumferentially provided with gear teeth for meshing transmission, in the extruder, the low-speed shaft 31 is an output shaft, the high-speed shaft 32 is an input shaft, and the gear box is a speed reducing mechanism. In another embodiment of the gear box, when the gear box is used as an acceleration mechanism, the low speed shaft 31 is an input shaft, and the high speed shaft 32 is an output shaft, the bearings 34 and the meshing points on the upper part of the gear box can be cooled and lubricated in the same way. The number of the transmission shafts 33 is not limited to only one, and the transmission ratio between the low speed shaft 31 and the high speed shaft 32 can be adjusted by engaging a plurality of the transmission shafts 33.

In order to prevent the bearing 34 from being excessively worn and prolong the service life, the first oil inlet channel 13 and the second oil inlet channel 15 are both provided with a lubricating port on the inner wall of the box body 1, and the lubricating port faces towards the corresponding bearing 34. The bearing 34 is lubricated and cooled by injecting oil through the lubricating port, so that the service life of the bearing 34 can be greatly prolonged. Specifically, the openings of the first oil inlet passage 13 at the inner wall of the first end 11 face three bearings 34 at the front, middle, and rear ends of the low-speed shaft 31, respectively. Specifically, the openings of the inner wall of the second oil inlet passage 15 at the second end 12 face the bearings 34 at the front and rear ends of the high speed shaft 32 and the engagement point of the high speed shaft 32 with the propeller shaft 33, respectively.

Preferably, the case 1 further includes a draft tube having one end communicating with the oil inlet path and the other end facing the gear teeth of the transmission shaft 33 engaged with the high speed shaft 32. It is understood that the high speed shaft 32 and the propeller shaft 33 generate a large amount of heat at their engagement, and need to be heavily lubricated and cooled. As shown in fig. 1, when the high-speed shaft 32 is located above the low-speed shaft 31, the oil flowing out of the opening of the inner wall only by the oil return path is difficult to directly reach the meshing position of the high-speed shaft 32 and the transmission shaft 33, and the oil can directly flow to the meshing position of the high-speed shaft 32 and the transmission shaft 33 through the drainage tube, so that the meshing position of the high-speed shaft 32 and the transmission shaft 33 is directly lubricated and cooled. Specifically, the drain tube communicates with the second oil inlet passage 15.

Preferably, as shown in fig. 3, the circulation assembly 2 further includes a cooler 22, the cooler 22 is disposed on the circulation oil path, and the cooler 22 is configured to cool the oil of the circulation oil path. Fluid is located the bottom in box 1, and partial fluid upwards splashes through the rotation of gear, finally still can fall back the bottom, and some fluid is erupted from the hydraulic fluid port of top through circulation subassembly 2 in addition, also can fall back the bottom after lubricating and cooling meshing point and bearing 34. With the continuous use of the gear box, the temperature of the internal oil is higher and higher, so that the lubricating and cooling effects of the oil are reduced. And the cooler 22 can be cooled off the pump body 21 from the oil liquid of the lower extreme of box 1 to the upper end of taking out, makes the oil liquid temperature in the box 1 keep at a stable temperature through the circulation, has guaranteed the lubrication and the cooling effect of oil liquid, has prolonged the life of gear box.

Specifically, the cooler 22 has a heat exchanging end, the heat exchanging end is connected with the circulating oil path in a heat exchanging manner, a cooling liquid flows in the heat exchanging end, and the low-temperature cooling liquid flows through the heat exchanging end to cool the oil liquid in the circulating oil path.

Preferably, as shown in fig. 3, the circulation assembly 2 further includes a filter 23, the filter 23 being disposed on the circulation oil path, the filter 23 being located upstream of the cooler 22. It will be appreciated that over time, wear of the gears and bearings 34 within the gearbox may occur, such that debris is present in the oil, which may cause blockage of the oil circuit, and which may in turn further increase wear of the gears and bearings 34. And the filter 23 can filter the oil in the circulating oil way, so that the fragments cannot enter the box body 1 again after entering the circulating oil way along with the oil, and the service life of the gear box is prolonged.

As shown in fig. 3, the circulation assembly 2 further includes a temperature measuring member 24, the temperature measuring member 24 being disposed on the circulation oil path, the temperature measuring member 24 being configured to measure the temperature of the oil in the circulation oil path. When the temperature of the oil in the circulating oil path is too high, the heat exchange capacity can be improved by increasing the flow rate of the cooling liquid in the cooler 22, so that the temperature of the oil is reduced to the temperature range of normal operation.

As shown in fig. 3, the circulation assembly 2 further includes a pressure measuring part 25, the pressure measuring part 25 being disposed on the circulation oil path, the pressure measuring part 25 being configured to measure the pressure of the oil in the circulation oil path. The pressure measuring part 25 can judge whether a passage formed by the circulating oil path, the oil inlet path and the oil return path is smooth or not by measuring the pressure of the oil pressure in the circulating oil path, if the pressure measured by the pressure measuring part 25 is increased, the condition that the passage is blocked is indicated, whether maintenance or repair is needed or not is judged according to a specific pressure value, the accident risk can be reduced, the gear box can be maintained in time, and the service life is prolonged.

Preferably, the tank 1 is cast, and the oil inlet path and the oil return path are cast during casting. Casting production efficiency is high, and is with low costs, compares in setting up the pipeline, casts out oil inlet way and oil return way when the casting, can save space, reduces the tube coupling, reduces the oil leak risk, can also reduce design cost.

As shown in fig. 3, the circulating component 2 further comprises a mounting part 4, the circulating component 2 is fixedly arranged on the mounting part 4, the mounting part 4 is detachably connected with the box body 1, and the relative angle between the mounting part 4 and the box body 1 is adjustable. The circulating assembly 2 is used as a standard module and is externally hung on the box body 1 through the mounting piece 4, so that the design cost and the accessory cost can be greatly reduced. Since the box body 1 can define the first end 11 or the second end 12 as the bottom end according to actual needs, the installation member 4 can ensure that the circulating assembly 2 always keeps the same installation direction by being installed in the box body 1 or reversely.

When the first end 11 of the housing 1 is the bottom end, the end of the circulating oil path connected to the first oil return path 14 is the oil inlet end of the pump body 21, and the other end is the oil outlet end. When the second end 12 of the box 1 is the bottom end, the end of the circulating oil path connected to the second oil return path 16 is the oil inlet end of the pump body 21, and the other end is the oil outlet end. The circulating assembly 2 is always installed in the forward direction, the oil inlet end of the circulating oil path is always communicated with the oil return path at the bottom end of the box body 1, and the oil outlet end of the circulating oil path is always communicated with the oil inlet path at the top end of the box body 1.

Specifically, as shown in fig. 3, the mount 4 is provided with a plurality of mounting holes 41, and the positions of the plurality of mounting holes 41 are centrosymmetric with respect to the center of the mount 4. That is, when the first end 11 of the case 1 is the bottom end, the mounting tool 4 can be fixedly mounted to the case 1 through the mounting hole 41 by a screw. The mounting member 4 can also be fixedly mounted to the housing 1 through the mounting hole 41 by means of screws when the second end 12 of the housing 1 is the bottom end, while the mounting angle between the mounting member 4 and the housing 1 is changed by 180 deg. in relation to the case when the first end 11 of the housing 1 is the bottom end.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A gearbox, comprising:

the oil-feeding type oil-return device comprises a box body (1), wherein an oil feeding path and an oil return path are formed in the box body (1), openings are formed in the inner walls, located at a first end (11) and a second end (12), of the box body (1), of the oil feeding path and the oil return path, and oil is arranged in the box body (1);

the oil return device comprises a circulation assembly (2), wherein the circulation assembly (2) comprises a circulation oil path and a pump body (21), two ends of the circulation oil path are respectively communicated with the oil inlet path and the oil return path, and the pump body (21) is arranged on the circulation oil path.

2. Gearbox according to claim 1, characterised in that the gearbox further comprises a transmission assembly (3), the transmission assembly (3) comprises a low speed shaft (31), a high speed shaft (32) and a transmission shaft (33) which are rotatably arranged in the casing (1), the transmission shaft (33) is respectively engaged with the low speed shaft (31) and the high speed shaft (32) through gears, the low speed shaft (31) is arranged at the first end (11), the high speed shaft (32) is arranged at the second end (12), and one end of the low speed shaft (31) and one end of the high speed shaft (32) both extend out of the casing (1).

3. The gearbox according to claim 2, characterized in that the casing (1) further comprises a draft tube having one end communicating with the oil inlet passage and the other end facing the teeth of the transmission shaft (33) engaging with the high speed shaft (32).

4. The gearbox according to claim 1, characterized in that the circulation assembly (2) further comprises a cooler (22), the cooler (22) being disposed on the circulation oil circuit, the cooler (22) being configured to cool the oil of the circulation oil circuit.

5. Gearbox according to claim 4, characterised in that the circulation assembly (2) further comprises a filter (23), which filter (23) is arranged on the circulation oil path, which filter (23) is located upstream of the cooler (22).

6. The gearbox according to claim 1, characterized in that the circulating assembly (2) further comprises a temperature measuring member (24), the temperature measuring member (24) being disposed on the circulating oil path, the temperature measuring member (24) being configured to measure the temperature of the oil in the circulating oil path.

7. A gearbox according to claim 1, in which the circulation assembly (2) further comprises a pressure measurement member (25), the pressure measurement member (25) being arranged on the circulation circuit, the pressure measurement member (25) being configured to measure the pressure of the oil in the circulation circuit.

8. Gearbox according to claim 1, characterised in that the housing (1) is cast, and that the oil inlet and return channels are cast during casting.

9. A gearbox according to any one of the preceding claims 1 to 8, characterised by further comprising a mounting member (4), the circulation assembly (2) being fixedly arranged to the mounting member (4), the mounting member (4) being detachably connected to the casing (1), the relative angle between the mounting member (4) and the casing (1) being adjustable.

10. Gearbox according to claim 9, characterised in that the mounting member (4) is provided with a plurality of mounting holes (41) and that the plurality of mounting holes (41) are located centrally symmetrically with respect to the centre of the mounting member (4).