Hydraulic jacking device for centering adjustment of high-power diesel engine generator

Abstract

The utility model provides a hydraulic jacking device for centering adjustment of a high-power diesel engine generator, and belongs to the technical field of heavy equipment installation. Comprising a hydraulic jack, a two-position four-way hydraulic valve, a hydraulic cylinder, a threaded piston rod, a bracket and a motor, an oil outlet and an oil return opening in the left end of the hydraulic cylinder are connected with an oil inlet and an oil outlet of the hydraulic jack through a two-position four-way hydraulic valve, a hydraulic piston is arranged in the hydraulic cylinder, the right end of the hydraulic cylinder is fixedly connected with a support, the right end of the support is fixedly connected with a motor, and a sleeve is coaxially and fixedly connected to an output shaft of the motor. The threaded piston rod can freely move in the sleeve in the axial direction and is screwed with a center thread at the left end of the support, and the left end of the threaded piston rod is freely and rotatably connected with the hydraulic piston. The hydraulic jacking device is small in size, large in jacking thrust, high in adjusting precision and easy to operate, and the high-precision adjusting efficiency of heavy equipment is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heavy equipment installation, and in particular relates to a hydraulic jacking device for centering adjustment of a high-power diesel engine generator. Background Art

[0002] At present, the centering adjustment process of high-power medium-speed diesel engine generators generally relies on manpower, and the position of the generator is changed by adjusting the jacking bolts arranged in the vertical, lateral and axial directions at the four corners of the generator to achieve the centering adjustment of the generator and the diesel engine shaft system. Since the weight of the generator of a high-power (5000-10000kW) medium-speed diesel engine generator set is relatively heavy, generally between 20 and 40 tons, it is necessary to configure multiple sets of jacking bolts in the vertical, lateral and axial directions of each corner of the generator set, and multiple people cooperate to rotate the jacking bolts to complete the adjustment of the generator position.

[0003] This method of adjusting by using jacking bolts to center the diesel engine and generator of a high-power diesel generator set requires repeated lifting, left-right, front-back adjustment of the positions of the four feet of the generator set during the adjustment process. Since the generator is relatively heavy and the generator set has high requirements for centering, this process relies on manpower to use jacking bolts for adjustment. Generally, a factory needs 2 to 3 people and 1 to 1.5 days to complete. The workload is large, the work efficiency is low, and the labor intensity is high. It does not meet the production efficiency and progress requirements of medium-speed high-power diesel generator factories. Therefore, it is necessary to propose improvements. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a hydraulic jacking device for centering adjustment of a high-power diesel engine generator. On the basis of the existing connection and fixing method between the crude oil generator set and the supporting base, and on the basis of meeting the vertical positioning demand of the diesel engine, the utility model meets the demand for accurate positioning of the unit in the horizontal plane by designing a large-thrust and high-precision hydraulic jacking device, and can ensure that the unit can be accurately positioned when the unit is tilted or tilted at a large angle; the device has a small size, a large jacking thrust, a high adjustment accuracy, and is easy to operate, which greatly improves the high-precision adjustment efficiency of heavy equipment.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A hydraulic jacking device for centering and adjusting a high-power diesel engine generator comprises a hydraulic jack, a two-position four-way hydraulic valve, a hydraulic cylinder, a threaded piston rod, a bracket and a motor; the oil outlet and the oil return port at the left end of the hydraulic cylinder are connected to the oil inlet and outlet of the hydraulic jack through the two-position four-way hydraulic valve, a hydraulic piston is arranged inside the hydraulic cylinder, the right end of the hydraulic cylinder is fixedly connected to the bracket, the right end of the bracket is fixedly connected to the motor, a sleeve is coaxially fixedly connected to the output shaft of the motor, a threaded piston rod is sleeved inside the sleeve, the threaded piston rod can freely move axially in the sleeve, the threaded piston rod is screwed with the central thread of the left end of the bracket, and the left end of the threaded piston rod is freely rotatably connected to the hydraulic piston.

[0007] Among them, the hydraulic cylinder includes an outer shell and an inner shell that are integrally formed, the inner shell is coaxially arranged inside the outer shell, the inner cavity of the inner shell forms a hydraulic cavity, and the cavity between the outer shell and the inner shell forms an oil storage cavity; the left end of the hydraulic cylinder is provided with an oil outlet connected to the hydraulic cavity and an oil return port connected to the oil storage cavity, and the inner shell wall is provided with an oil suction port that connects the hydraulic cavity and the oil storage cavity.

[0008] Furthermore, the oil outlet of the hydraulic cylinder and the oil inlet of the two-position four-way hydraulic valve, the oil outlet of the two-position four-way hydraulic valve and the oil inlet of the hydraulic jack, the oil outlet of the hydraulic jack and the oil return inlet of the two-position four-way hydraulic valve, and the oil return outlet and the oil return port of the two-position four-way hydraulic valve are all connected by pipelines.

[0009] Furthermore, a hexagonal head is provided at the right end of the threaded piston rod, and the cross-section of the inner cavity of the sleeve is also a hexagonal structure adapted to the hexagonal head. The length of the sleeve is equal to the length of the threaded piston rod. A threaded hole screwed with the threaded piston rod is provided at the center of the left end of the bracket, an annular platform is provided at the left end of the threaded piston rod, and a connecting groove is provided at the center of the right end of the hydraulic piston. An annular groove is provided in the connecting groove, and the annular platform of the threaded piston rod is clearance-matched with the annular groove.

[0010] Furthermore, two sealing rings for sealing contact with the hydraulic cylinder are provided on the outer circumferential surface of the hydraulic piston.

[0011] The advantages of this utility model compared with the prior art:

[0012] 1. This solution uses a large-torque DC reduction motor, which greatly reduces the size of the device, which is conducive to its operation in equipment leveling operations; the hydraulic cylinder propulsion mechanism with a threaded piston rod greatly improves the accuracy of hydraulic jacking operations, and is convenient for operation and control, and the adjustment is smooth, without problems such as jitter during the adjustment process; the hydraulic jack is connected by a pipeline, and the outer diameter of the hydraulic jack is within 150mm and the height is less than 100mm, which greatly improves its applicability in different application occasions;

[0013] 2. This scheme is a high-thrust, high-precision hydraulic jacking device designed on the basis of the connection and fixing method between the crude oil generator set and the supporting base, and on the basis of meeting the vertical positioning requirements of the diesel engine. It has a large thrust, with a maximum thrust of ≥15T thrust; high adjustment accuracy, which can meet the requirement of 0.01mm accuracy of the jacking distance; the system is simple and easy to operate, which greatly improves the work efficiency, and the processing and manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the implementation system of the utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0017] See also Figure 1 , describe the embodiments of the present utility model in detail.

[0018] Embodiment: A hydraulic jacking device for centering and adjusting a high-power diesel engine generator comprises a hydraulic jack 1, a two-position four-way hydraulic valve 2, a hydraulic cylinder 3, a threaded piston rod 5, a bracket 6, and a motor 8.

[0019] The oil outlet 3-1 and the oil return port 3-2 at the left end of the hydraulic cylinder 3 are connected to the oil inlet and outlet ports of the hydraulic jack 1 through a two-position four-way hydraulic valve 2. A hydraulic piston 4 is arranged inside the hydraulic cylinder 3. The right end of the hydraulic cylinder 3 is fixedly connected to a bracket 6. One end of the bracket 6 is combined with the hydraulic cylinder 3 to seal the oil storage chamber. The right end of the bracket 6 is fixedly connected to a motor 8. A sleeve 7 is coaxially fixedly connected to the output shaft of the motor 8. A threaded piston rod 5 is sleeved inside the sleeve 7. The threaded piston rod 5 can move freely in the axial direction inside the sleeve 7. The threaded piston rod 5 is screwed with the center thread of the left end of the bracket 6. The left end of the threaded piston rod 5 is freely rotatably connected to the hydraulic piston 4.

[0020] in:

[0021] Preferably, the inner diameter of the hydraulic jack 1 is 100 mm, the rated working pressure is 20 MPa, and the rated lifting force is 150000 N;

[0022] The two-position four-way hydraulic valve 2 can work in a working state and a unloading state. In the working state, it can connect the hydraulic oil circuit between the hydraulic jack 1 and the oil outlet 3-1 and block the hydraulic oil circuit with the oil return port 3-2. In the unloading state, it can connect the hydraulic oil circuit between the hydraulic jack and the oil return port 3-2 and block the hydraulic oil circuit with the oil outlet 3-1.

[0023] The hydraulic cylinder 3 comprises an integrally formed outer shell 3-6 and an inner shell 3-7, the inner shell 3-7 is coaxially arranged inside the outer shell 3-6, the inner cavity of the inner shell 3-7 forms a hydraulic cavity 3-4, and the cavity between the outer shell 3-6 and the inner shell 3-7 forms an oil storage cavity 3-5; the left end of the hydraulic cylinder 3 is provided with an oil outlet 3-1 communicating with the hydraulic cavity 3-4 and an oil return port 3-2 communicating with the oil storage cavity 3-5, and the wall of the inner shell 3-7 is provided with an oil suction port 3-3 connecting the hydraulic cavity 3-4 and the oil storage cavity 3-5; the oil suction port 3-3 has a check function to prevent the hydraulic oil from flowing back to the oil storage cavity 3-5 when the hydraulic cavity 3-4 of the hydraulic cylinder 3 is pressurized; preferably, the inner diameter of the hydraulic cylinder is 30 mm;

[0024] The oil outlet 3-1 of the hydraulic cylinder 3 and the oil inlet of the two-position four-way hydraulic valve 2, the oil outlet of the two-position four-way hydraulic valve 2 and the oil inlet of the hydraulic jack 1, the oil outlet of the hydraulic jack 1 and the oil return inlet of the two-position four-way hydraulic valve 2, and the oil return outlet of the two-position four-way hydraulic valve 2 and the oil return port 3-2 are all connected by a pipeline 9.

[0025] The right end of the threaded piston rod 5 is provided with a hexagonal head 5-1, the distance between opposite sides is 30mm, the inner cavity cross-section of the sleeve 7 is also a hexagonal structure adapted to the hexagonal head 5-1, and the length of the sleeve 7 is equal to the length of the threaded piston rod 5; the hexagonal head 5-1 of the threaded piston rod 5 can move freely along its axial direction inside the sleeve 7, and one end of the sleeve 7 is fixedly connected to the output shaft of the motor 8;

[0026] A threaded hole 6-1 is provided at the center of the left end of the bracket 6, which is screwed with the threaded piston rod 5. The thread specification of the threaded piston rod is M20×1.5, which is screwed with the threaded hole 6-1 to form a threaded kinematic pair; an annular platform 5-2 is provided at the left end of the threaded piston rod 5, and a connecting groove 4-2 is provided at the center of the right end of the hydraulic piston 4. An annular groove 4-3 is provided in the connecting groove 4-2. The annular platform 5-2 of the threaded piston rod 5 is clearance-matched with the annular groove 4-3, and the threaded piston rod 5 can rotate freely in the hydraulic piston 4;

[0027] Two sealing rings 4 - 1 for sealing contact with the hydraulic cylinder 3 are arranged on the outer circumferential surface of the hydraulic piston 4 .

[0028] Motor 8: Motor 8 is a high-torque DC reduction motor that can rotate in both forward and reverse phases. The maximum torque of the motor is 30N.m and the rated speed is about 26rpm; Motor 8 can drive sleeve 7 to rotate in both forward and reverse phases.

[0029] When the device is working, the two-position four-way hydraulic valve 2 is in the working position, the motor 8 starts forward and drives the sleeve 7 to rotate forward, the sleeve 7 drives the threaded piston rod 5 to rotate, pushes the hydraulic piston 4 forward, pressurizes the hydraulic oil, and the pressurized hydraulic oil drives the hydraulic jack 1 push rod to extend through the pipeline 9 and the two-position four-way hydraulic valve 2 to lift the object. If the height exceeds the standard after lifting, the two-position four-way hydraulic valve 2 can be kept stationary, the motor 8 starts reversely and drives the sleeve 7 to rotate reversely, the sleeve 7 drives the threaded piston rod 5 to rotate, so that the hydraulic piston 4 retreats, and under the action of the gravity of the heavy object or other external forces, the push rod of the hydraulic jack 1 retracts, driving the hydraulic oil to flow back to the hydraulic cylinder, thereby completing the object lowering operation.

[0030] The hydraulic jacking device has a small overall size and can be integrated into an independent module to lift / lower the equipment during installation, and the equipment can be leveled through the cooperation of multiple independent modules. It is also possible to use a hydraulic cylinder in the device and control multiple hydraulic jacks to operate in turn through multiple sets of two-position four-way hydraulic valves used in parallel to level the equipment.

[0031] Since the motor 8 of the device is a DC motor, it is easy to operate the reversing, and it is a reduction motor with a large torque and a rated torque of 30N.m, which can pressurize the hydraulic oil to more than 20MPa, and a single hydraulic jack can lift a weight of 15T; the rated speed of the motor 8 is only about 26rpm, that is, the moving speed of the threaded piston rod is about 39mm / min, and the lifting speed of the hydraulic jack is about 3.51mm / min, which is slow. Therefore, the device can easily achieve precise adjustment with a resolution of 0.01mm in combination with the forward and reverse rotation of the motor, and is particularly suitable for precise installation and adjustment of heavy equipment with high installation accuracy requirements.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Hydraulic jacking device for centering adjustment of high-power diesel engine generator, characterized by: The invention comprises a hydraulic jack (1), a two-position four-way hydraulic valve (2), a hydraulic cylinder (3), a threaded piston rod (5), a bracket (6), and a motor (8); the oil outlet (3-1) and the oil return port (3-2) at the left end of the hydraulic cylinder (3) are connected to the oil inlet and outlet of the hydraulic jack (1) through the two-position four-way hydraulic valve (2); a hydraulic piston (4) is arranged inside the hydraulic cylinder (3); the right end of the hydraulic cylinder (3) is fixedly connected to the bracket (6); the right end of the bracket (6) is fixedly connected to the motor (8); a sleeve (7) is coaxially fixedly connected to the output shaft of the motor (8); a threaded piston rod (5) is sleeved inside the sleeve (7); the threaded piston rod (5) is freely movable in the axial direction inside the sleeve (7); the threaded piston rod (5) is screwed with the central thread of the left end of the bracket (6); the left end of the threaded piston rod (5) is freely rotatably connected to the hydraulic piston (4).

2. The hydraulic jacking device for centering and adjusting a high-power diesel engine generator according to claim 1 is characterized in that: The hydraulic cylinder (3) comprises an outer shell (3-6) and an inner shell (3-7) which are integrally formed. The inner shell (3-7) is coaxially arranged inside the outer shell (3-6). The inner cavity of the inner shell (3-7) forms a hydraulic cavity (3-4). The cavity between the outer shell (3-6) and the inner shell (3-7) forms an oil storage cavity (3-5). The left end of the hydraulic cylinder (3) is provided with an oil outlet (3-1) communicating with the hydraulic cavity (3-4) and an oil return port (3-2) communicating with the oil storage cavity (3-5). The wall of the inner shell (3-7) is provided with an oil suction port (3-3) communicating with the hydraulic cavity (3-4) and the oil storage cavity (3-5).

3. The hydraulic jacking device for centering and adjusting a high-power diesel engine generator according to claim 1 is characterized in that: The oil outlet (3-1) of the hydraulic cylinder (3) and the oil inlet of the two-position four-way hydraulic valve (2), the oil outlet of the two-position four-way hydraulic valve (2) and the oil inlet of the hydraulic jack (1), the oil outlet of the hydraulic jack (1) and the oil return inlet of the two-position four-way hydraulic valve (2), and the oil return outlet of the two-position four-way hydraulic valve (2) and the oil return port (3-2) are all connected by a pipeline (9).

4. The hydraulic jacking device for centering and adjusting a high-power diesel engine generator according to claim 1 is characterized in that: The right end of the threaded piston rod (5) is provided with a hexagonal head (5-1), the inner cavity cross-section of the sleeve (7) is also a hexagonal structure adapted to the hexagonal head (5-1), and the length of the sleeve (7) is equal to that of the threaded piston rod (5).

5. The hydraulic jacking device for centering and adjusting a high-power diesel engine generator according to claim 1 is characterized in that: A threaded hole (6-1) screwed with the threaded piston rod (5) is provided at the center of the left end of the bracket (6); an annular platform (5-2) is provided at the left end of the threaded piston rod (5); a connecting groove (4-2) is provided at the center of the right end of the hydraulic piston (4); an annular groove (4-3) is provided in the connecting groove (4-2); and the annular platform (5-2) of the threaded piston rod (5) and the annular groove (4-3) are clearance-matched.

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