A transfer case with pump leak detection function

Abstract

The present application relates to a kind of pump leakage detection function's transfer case, including box and pump seat installed on box, the inner periphery of pump seat forms lubricating cavity, oil inlet channel, detection channel, oil drain channel and oil drain channel are all formed in the radial of pump seat and pass to lubricating cavity, oil inlet channel one end is connected to lubricating oil source, detection channel one end forms detection port, oil drain channel one end forms oil drain port, oil drain channel one end forms oil drain port, pump seat is also provided with control counterbore, control counterbore and oil drain channel intersect, pump seat has lubrication mode and detection mode, when lubrication mode, control counterbore is provided with first plugging piece;When detection mode, control counterbore is provided with second plugging piece.The design solves the problem that the pump leakage of mine digging transfer case cannot be detected, so that the transfer case realizes the function of pump leakage detection, and the troubleshooting method is time-saving and easy to operate, can promptly troubleshoot pump leakage failure, and is convenient for routine maintenance detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering machinery transmission technology, in particular to a transfer case with pump leakage detection function. BACKGROUND

[0002] The hydraulic pump is connected with the transfer case through the main shaft spline, and the pump shaft is sealed by the oil seal. In the working process, the failure of the oil seal will cause pump leakage. Pump leakage will cause many hazards, not only will it cause the performance of the pump to decline, but also will cause the hydraulic oil to directly leak into the transfer case, polluting the gear oil. If it cannot be eliminated early, pump leakage will become more and more serious, eventually leading to the damage of the pump and even the repair of the entire machine. Therefore, it is necessary to regularly detect pump leakage, and repair it in time in the early stage of leakage.

[0003] At present, the transfer case for mining cannot detect pump leakage. Due to the lack of daily detection, only when pump failure is found can the cause of the failure be investigated by disassembling the pump. Only after the hydraulic pump is disassembled can it be observed whether the oil seal is damaged.

[0004] The hydraulic pump connected with the large mining transfer case is mostly a double pump or a triple pump. As shown in the figure, it is large in size and difficult to disassemble. The investigation of pump leakage will consume a lot of manpower and time, and seriously delay the construction period. Due to the lack of daily detection of the hydraulic pump, it is difficult to find the early stage of pump leakage. As the leakage amount becomes larger and larger, the hydraulic pump and other parts will be damaged in the end, causing great loss. Figure 1 SUMMARY

[0005] In view of the deficiencies in the prior art, the present application provides a transfer case with pump leakage detection function, which solves the problem that the pump leakage of the mining transfer case cannot be detected, enables the transfer case to realize the function of pump leakage detection, and the investigation method is time-saving and easy to operate, which can investigate pump leakage failure in time and is convenient for daily maintenance and detection.

[0006] ​The present application discloses a transfer case with pump leakage detection function, which comprises a case body and a pump seat installed on the case body, an inner periphery of the pump seat forms a lubricating cavity, an oil inlet channel, a detection channel, an oil leakage channel and an oil discharge channel are radially formed on the pump seat, one end of the oil inlet channel is connected to an oil source and the other end penetrates to the lubricating cavity, one end of the detection channel forms a detection port and the other end penetrates to the lubricating cavity, one end of the oil leakage channel forms an oil leakage port and the other end penetrates to the lubricating cavity, one end of the oil discharge channel forms an oil discharge port and the other end penetrates to the lubricating cavity, a control counterbore is further formed on the pump seat, the control counterbore intersects with the oil leakage channel, the pump seat has a lubricating mode and a detection mode, when the pump seat is in the lubricating mode, a first plugging member is arranged at the control counterbore, the oil leakage channel is in an open state and the oil inlet channel is in an open state, when the pump seat is in the detection mode, the detection channel is in an open state, a second plugging member is arranged at the control counterbore, the second plugging member plugs the oil leakage channel, the oil leakage channel is in a plugging state and the oil inlet channel is in a plugging state.

[0007] Optionally, a control switch is arranged between the oil inlet channel and the oil source, when the control switch is in an open state, the oil inlet channel is in an open state, and when the control switch is in a closed state, the oil inlet channel is in a plugging state.

[0008] Optionally, the oil inlet channel is vertically formed at an upper end of the pump seat and the oil discharge channel is vertically formed at a lower end of the pump seat.

[0009] Optionally, a receiving hole is formed on the pump seat, when the first plugging member is arranged in the control counterbore, the second plugging member is arranged in the receiving hole, and when the second plugging member is arranged in the control counterbore, the first plugging member is arranged in the receiving hole.

[0010] Optionally, an included angle between the detection channel and the oil inlet channel ranges from 10° to 45°, and an included angle between the oil leakage channel and the oil inlet channel ranges from 45° to 80°.

[0011] Optionally, an end of the oil inlet channel close to the lubricating cavity has a throttle hole with a reduced inner diameter, and the inner diameter of the throttle hole is 2 mm.

[0012] Optionally, when the pump seat is in the lubricating mode, a plug is arranged at the detection port.

[0013] Optionally, the first plugging member and the second plugging member are sealing screws with different lengths.

[0014] Optionally, the inner diameters of the oil inlet channel, the detection channel, the oil leakage channel and the oil discharge channel are all 12mm.

[0015] Optionally, a plurality of pump seats are arranged on the box.

[0016] Compared with the prior art, the technical scheme of the present application has the following beneficial effects: the design scheme of the transfer box and the pump seat of the present application can simultaneously realize the functions of pump shaft oil seal leakage detection and pump shaft spline lubrication, and can conveniently and quickly troubleshoot whether the pump leaks without disassembling the pump, thereby saving labor and time costs; thereby regular detection of the transfer box can be realized, the pump leakage can be discovered and repaired in time in the early stage, and greater loss can be effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Figure 1 is a schematic diagram of the installation of a pump on a mine digging transfer box according to the present application;

[0018] Figure 2 Figure 2 is a schematic diagram of the distribution of pump seats on a transfer box according to the present application;

[0019] Figure 3 Figure 3 is a schematic diagram of a transfer box and a pump seat according to the present application;

[0020] Figure 4 Figure 4 is a schematic diagram of a cross section of a pump seat according to the present application (along the axis of the oil inlet channel and the oil discharge channel).

[0021] In the drawings: 1 - oil inlet, 2 - detection port, 3 - control counterbore, 4 - first plugging piece, 5 - second plugging piece, 6 - oil discharge port. DETAILED DESCRIPTION

[0022] The exemplary embodiments of this application are described herein with reference to the accompanying drawings, which include various details of the embodiments of this application to assist in understanding them. These should be considered in their context only. Thus, those of ordinary skill in the art will recognize the various changes and modifications of the embodiments described herein, without departing from the scope and spirit of the present application. Also, for the sake of clarity and conciseness, the description below omits the description of well-known functions and structures.

[0023] As Figure 2 , Figure 3 and Figure 4As shown, the transfer case with pump leakage detection function of the present application comprises a case body and a pump seat installed on the case body, the inner periphery of the pump seat forms a lubricating cavity, the pump seat is radially provided with an oil inlet channel, a detection channel, an oil leakage channel and an oil discharge channel, one end of the oil inlet channel forms an oil inlet 1 and is connected to an oil source, the other end penetrates into the lubricating cavity, one end of the detection channel forms a detection port 2, the other end penetrates into the lubricating cavity, one end of the oil leakage channel forms an oil leakage port, the other end penetrates into the lubricating cavity, one end of the oil discharge channel forms an oil discharge port 6, the other end penetrates into the lubricating cavity, the pump seat is further provided with a control counterbore 3, the control counterbore 3 intersects with the oil leakage channel, the pump seat has a lubricating mode and a detection mode, when the pump seat is in the lubricating mode, a first plugging member 4 is arranged at the control counterbore 3, the oil leakage channel is in an open state, and the oil inlet channel is in an open state; when the pump seat is in the detection mode, the detection channel is in an open state, a second plugging member 5 is arranged at the control counterbore 3, the second plugging member 5 is plugged on the oil leakage channel, the oil leakage channel is in a plugged state, and the oil inlet channel is in a plugged state.

[0024] In the present embodiment, the oil leakage channel is perpendicular to the control counterbore, but in other embodiments, the control counterbore can intersect with the oil leakage channel at other angles, as long as the second plugging member can plug the oil leakage channel when inserted into the control counterbore.

[0025] More specifically, a control switch is arranged between the oil inlet 1 and the oil source, when the control switch is in an open state, the oil inlet channel is in an open state; when the control switch is in a closed state, the oil inlet channel is in a plugged state; the oil inlet channel is vertically arranged at the upper end of the pump seat, and the oil discharge channel is vertically arranged at the lower end of the pump seat; the pump seat is provided with a receiving hole, when the first plugging member 4 is located in the control counterbore 3, the second plugging member 5 is placed in the receiving hole; when the second plugging member 5 is located in the control counterbore 3, the first plugging member 4 is placed in the receiving hole; the included angle between the detection channel and the oil inlet channel is 15°, and the included angle between the oil leakage channel and the oil inlet channel is 60°; the end of the oil inlet channel close to the lubricating cavity has a throttle hole with a reduced inner diameter, the inner diameter of the throttle hole is 2mm; when the pump seat is in the lubricating mode, a plug is arranged at the detection port 2; the first plugging member 4 and the second plugging member 5 are sealing screws with different lengths; the inner diameters of the oil inlet channel, the detection channel, the oil leakage channel and the oil discharge channel are all 12mm.

[0026] In other embodiments, the included angle between the detection channel and the oil inlet channel can be controlled to be in the range of 10°-45°, and the included angle between the oil leakage channel and the oil inlet channel can be controlled to be in the range of 45°-80°, the purpose is to ensure that the height of the oil leakage port not only ensures the oil level height in the lubricating cavity, but also does not waste too much oil, and the detection port needs to be higher than the oil leakage port, and the opening positions of the detection channel and the oil inlet channel need to ensure the strength of the pump seat, and the opening positions of the detection channel and the oil leakage channel need to ensure the strength of the pump seat.

[0027] Further, when the pump is installed, the lubricating cavity is a closed cavity formed between the pump mounting surface and the pump seat. In the normal lubrication mode, the control switch between the oil inlet channel and the lubricating oil source is in the open state, the lubricating oil enters the lubricating cavity through the oil inlet channel, and the main shaft spline is lubricated, and when the oil level of the lubricating oil reaches the oil drain port, the lubricating oil is drained from the oil drain port to the box, which not only ensures the lubrication effect of the main shaft spline, but also keeps the pressure in the lubricating cavity at the same level; when the pump leakage needs to be detected, the control switch is closed, and the first sealing member 4 is replaced with the second sealing member 5, that is, the oil drain channel is sealed, at this time, the pump is kept working, and when the pump shaft oil seal leaks, the oil level in the lubricating cavity will continue to rise, and finally flow out from the detection port 2. After judging that the pump leaks, the pump can be disassembled for maintenance, and the oil in the lubricating cavity can be discharged through the oil drain channel before disassembly. In addition, by the time of the oil flowing out from the detection port 2, the degree of pump leakage can be inferred. If the leakage is serious, the gear oil in the transfer case will be contaminated, and the gear oil in the case needs to be replaced in time to avoid affecting the service life of the gears and bearings.

[0028] In addition, in the lubrication mode, the detection port 2 and the oil drain port 6 are provided with sealing plugs.

[0029] As shown in Figure 2 The box body is provided with four pump seats, all of which adopt the pump seat structure with the above-mentioned detection and lubrication functions, and the structure of each pump seat can refer to the structure shown in the embodiment, which will not be described here.

[0030] The above-mentioned detection function is easy to operate, can quickly eliminate pump leakage faults, and is suitable for daily detection.

[0031] Compared with the prior art, the design scheme of the transfer case and the pump seat of the present application can simultaneously have the functions of pump shaft oil seal leakage detection and pump shaft spline lubrication, and can conveniently and quickly check whether the pump leaks without disassembling the pump, thereby saving manpower and time cost; thereby the transfer case can be regularly detected, the pump leakage can be found and repaired in time in the early stage, and greater loss can be effectively avoided.

[0032] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made depending on design requirements and other factors. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A transfer case having a pump leak detection function, characterized by, The pump seat is provided with a lubricating cavity formed by the inner periphery of the pump seat, an oil inlet channel, a detection channel, an oil leakage channel and an oil discharge channel are radially formed on the pump seat, one end of the oil inlet channel is connected to an oil source and the other end penetrates the lubricating cavity, one end of the detection channel forms a detection port and the other end penetrates the lubricating cavity, one end of the oil leakage channel forms an oil leakage port and the other end penetrates the lubricating cavity, one end of the oil discharge channel forms an oil discharge port and the other end penetrates the lubricating cavity, and a control counterbore is further formed on the pump seat and intersects with the oil leakage channel, the pump seat has a lubricating mode and a detection mode, when the pump seat is in the lubricating mode, a first plugging member is arranged at the control counterbore, the oil leakage channel is in an open state, and the oil inlet channel is in an open state; when the pump seat is in the detection mode, the detection channel is in an open state, a second plugging member is arranged at the control counterbore and plugs the oil leakage channel, the oil leakage channel is in a plugging state, and the oil inlet channel is in a plugging state.

2. The transfer case of claim 1, wherein, A control switch is arranged between the oil inlet channel and the oil source, when the control switch is in an open state, the oil inlet channel is in an open state; and when the control switch is in a closed state, the oil inlet channel is in a plugging state.

3. The transfer case of claim 1, wherein, The oil inlet channel is vertically formed at the upper end of the pump seat, and the oil discharge channel is vertically formed at the lower end of the pump seat.

4. The transfer case of claim 1, wherein, A receiving hole is formed on the pump seat, when the first plugging member is arranged in the control counterbore, the second plugging member is arranged in the receiving hole; and when the second plugging member is arranged in the control counterbore, the first plugging member is arranged in the receiving hole.

5. The transfer case of claim 4, wherein, The included angle between the detection channel and the oil inlet channel ranges from 10° to 45°, and the included angle between the oil leakage channel and the oil inlet channel ranges from 45° to 80°.

6. The transfer case of claim 1, wherein, One end of the oil inlet channel close to the lubricating cavity has a throttle hole with a reduced inner diameter, and the inner diameter of the throttle hole is 2 mm.

7. The transfer case of claim 1, wherein, When the pump seat is in the lubricating mode, a plug is arranged at the detection port.

8. The transfer case of claim 1, wherein, The first plugging member and the second plugging member are sealing screws with different lengths.

9. The transfer case of claim 1, wherein, The inner diameters of the oil inlet channel, the detection channel, the oil leakage channel and the oil discharge channel are all 12 mm.

10. The transfer case of claim 1, wherein, A plurality of pump seats are arranged on the box.

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