Double-transfer-case hydraulic pump station and engineering machinery

Abstract

The utility model provides a double-transfer-case hydraulic pump station and engineering machinery, the double-transfer-case hydraulic pump station comprises a hydraulic oil tank, a left side motor pump set and a right side motor pump set, the left side motor pump set and the right side motor pump set are installed on the left side and the right side of the hydraulic oil tank respectively, and hydraulic oil is provided by the hydraulic oil tank; the left motor pump set and the right motor pump set each comprise a motor, a transfer case and a plurality of hydraulic pumps, the input end of each transfer case is in drive connection with the output end of the corresponding motor, the output end of each transfer case is in drive connection with the corresponding hydraulic pump, the input end of each hydraulic pump is connected with a hydraulic oil tank, and the output end of each hydraulic pump is connected with a hydraulic pump. And the output end supplies oil to a corresponding executing mechanism of the equipment. The size and the weight of equipment are reduced, maintenance and normal operation are facilitated, the requirements for pipe distribution and wiring are met, the labor intensity of maintenance personnel is relieved, power and flow distribution is more uniform, and the compactness and the attractiveness of the equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulics, in particular to a double transfer case hydraulic pump station and engineering machinery. Background Art

[0002] Mechanical rock breaking has the advantages of high crushing hardness and high operating efficiency. It has been widely used in mining, construction engineering, resource exploration and other fields. At present, the excavation, rock breaking and support functions of hard rock excavation equipment are basically driven by hydraulic systems, with many actuators and large flow requirements. It has high requirements on motor power and the number of pump stations, and there are the following problems:

[0003] First, the overall structure of the equipment is large and the layout is unreasonable. In the hydraulic pump station part of the equipment, in order to meet the requirements of large flow and multiple actuators, multiple pumps are usually selected in series, which usually leads to a large weight on the equipment side where the pump station is installed, and an additional counterweight is required on the other side to solve the overall balance problem.

[0004] Second, the oil tank is shaped differently. In order to meet the needs of multiple pumps and multiple actuators, the oil tank arranged on one side is often affected by the structure and installation angle and has a special shape. It is often accompanied by a subsidiary oil tank, which is not conducive to the balance of both sides of the equipment and also brings difficulties to the cleaning and maintenance of the oil tank.

[0005] Third, it is not easy to repair. For a multi-pump series pump station arranged on one side, a single hydraulic pump failure will cause the entire equipment to be paralyzed.

[0006] Fourth, it is not convenient for pipeline layout. The centralized arrangement of the pump group will cause the hydraulic hoses from the hydraulic pump to the actuator to be intertwined. Utility Model Content

[0007] On the one hand, the utility model provides a double transfer case hydraulic pump station to solve the technical problems of the existing hard rock tunneling equipment's hydraulic system structure, unreasonable layout, inconvenience in maintenance and complex pipeline layout.

[0008] The technical solution adopted by the utility model is as follows:

[0009] A double transfer case hydraulic pump station, comprising:

[0010] Hydraulic oil tank;

[0011] The left motor pump group and the right motor pump group are respectively installed on the left and right sides of the hydraulic oil tank, and the hydraulic oil tank provides hydraulic oil;

[0012] The left motor pump group and the right motor pump group both include a motor, a transfer case and a plurality of hydraulic pumps. The input end of the transfer case is drivingly connected to the output end of the motor, and the output end of the transfer case is drivingly connected to the corresponding hydraulic pumps. The input end of each hydraulic pump is connected to the hydraulic oil tank, and the output end supplies oil to the corresponding actuator of the equipment.

[0013] Furthermore, the left motor pump group and the right motor pump group are symmetrically installed on the left and right sides of the hydraulic oil tank.

[0014] Furthermore, the hydraulic oil tank adopts a left-right symmetrical structure along the center line.

[0015] Furthermore, the left motor pump group and the right motor pump group are symmetrically installed on the left and right sides of the hydraulic oil tank along the center line of the hydraulic oil tank.

[0016] Furthermore, each hydraulic pump includes an open pump and a closed pump, wherein the closed pump supplies oil to the actuator in the equipment whose pressure and flow demand are greater than the set value, and the open pump supplies oil to the actuator in the equipment whose pressure and flow demand are less than the set value.

[0017] Furthermore, the transfer case includes a main output end and at least one auxiliary output end, the open pump in each hydraulic pump is drivingly connected to the auxiliary output end, and the closed pump in each hydraulic pump is drivingly connected to the main output end.

[0018] Furthermore, the hydraulic oil tank comprises a box body, and two sides of the box body are respectively provided with a plurality of oil supply interfaces for supplying oil to the hydraulic pumps of the motor pump group on the same side.

[0019] Furthermore, a cleaning cover is detachably provided on the box body.

[0020] Furthermore, a weight-reducing groove is concavely provided in the middle part of the box body, and the weight-reducing groove divides the inner cavity of the box body into two left and right oil-containing chambers. The upper ends of the two oil-containing chambers are connected, and flange openings are respectively provided at the bottoms on the left and right sides of the box body. An oil pipeline is connected between the two flange openings to connect the hydraulic oil in the two oil-containing chambers.

[0021] On the other hand, the present application also provides an engineering machinery, including the dual transfer case hydraulic pump station.

[0022] The utility model has the following beneficial effects:

[0023] The present application provides a double transfer case hydraulic pump station, comprising: a hydraulic oil tank, a left motor pump group and a right motor pump group, wherein the left motor pump group and the right motor pump group are respectively installed on the left and right sides of the hydraulic oil tank, and hydraulic oil is provided by the hydraulic oil tank; the left motor pump group and the right motor pump group each comprise a motor, a transfer case and a plurality of hydraulic pumps, the input end of the transfer case is drivingly connected to the output end of the motor, the output end of the transfer case is drivingly connected to the corresponding hydraulic pumps, the input end of each hydraulic pump is connected to the hydraulic oil tank, and the output end supplies oil to the corresponding actuator of the equipment. The present application installs two independent motor pump groups with transfer cases on the left and right sides of the hydraulic oil tank respectively. On the one hand, there is no need to add additional counterweights to solve the overall balance problem, ensuring the reduction of equipment size and weight; on the other hand, by arranging the pump group in a dual-motor multi-pump combination, when the actuators corresponding to a single or part of the pumps fail or need to be locked, it will not affect the normal operation of the remaining mechanisms of the equipment, and a mode of staged and side-by-side maintenance can be achieved. Thirdly, the left and right arrangements of the motor pump groups in the present application are compact and beautiful, which is more convenient for pipe and wiring requirements than the centralized arrangement of the pump groups, reduces the labor intensity of maintenance personnel, is simpler and more reasonable in structure, and better adapts to the equally symmetrical actuators of the equipment itself. Finally, the present application reasonably arranges the transfer case and reduces the driving mechanism of the equipment, so that the mechanical transmission is smoother, the mechanical reliability is higher, the power and flow distribution are more uniform, and the compactness and aesthetic characteristics of the equipment are improved.

[0024] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 It is a schematic diagram of the overall structure of a double transfer case hydraulic pump station of a preferred embodiment of the utility model.

[0027] Figure 2 It is a schematic diagram of the structure of the right motor pump group of the preferred embodiment of the utility model.

[0028] Figure 3 It is a schematic diagram of the structure of a hydraulic oil tank according to a preferred embodiment of the utility model.

[0029] As described in the figure: 1. Right motor pump group; 101. Motor; 102. Transfer case; 103. First variable piston pump; 104. Second variable piston pump; 105. Gear pump; 106. Third variable piston pump; 107. Vane pump; 108. Fourth variable piston pump; 2. Hydraulic oil tank; 201. Box body; 202. Cleaning cover; 203. First oil suction flange port; 204. Second oil suction flange port; 205. Third oil suction flange port; 206. Ball valve oil port; 207. Flange port; 208. Weight reduction groove; 3. Left motor pump group; 4. Oil pipeline. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0031] Reference Figure 1 and Figure 2 The preferred embodiment of the utility model provides a double transfer case hydraulic pump station, comprising a hydraulic oil tank 2, a left motor pump group 3 and a right motor pump group 1, wherein the left motor pump group 3 and the right motor pump group 1 are respectively installed on the left and right sides of the hydraulic oil tank 2, and the hydraulic oil is provided by the hydraulic oil tank 2;

[0032] The left motor pump group 3 and the right motor pump group 1 both include a motor 101, a transfer case 102 and a plurality of hydraulic pumps. The input end of the transfer case 102 is drivingly connected to the output end of the motor 101, and the output end of the transfer case 102 is drivingly connected to the corresponding hydraulic pumps. The input end of each hydraulic pump is connected to the hydraulic oil tank 2, and the output end supplies oil to the corresponding actuator of the equipment.

[0033] The present embodiment provides a double transfer case hydraulic pump station, comprising: a hydraulic oil tank 2, a left motor pump group 3 and a right motor pump group 1, wherein the left motor pump group 3 and the right motor pump group 1 are respectively installed on the left and right sides of the hydraulic oil tank 2, and hydraulic oil is provided by the hydraulic oil tank 2; the left motor pump group 3 and the right motor pump group 1 both comprise a motor 101, a transfer case 102 and a plurality of hydraulic pumps, the input end of the transfer case 102 is drivingly connected to the output end of the motor 101, the output end of the transfer case 102 is drivingly connected to the corresponding hydraulic pumps, the input end of each hydraulic pump is connected to the hydraulic oil tank 2, and the output end supplies oil to the corresponding actuator of the equipment. The present application installs two independent motor pump groups with transfer cases 102 on the left and right sides of the hydraulic oil tank 2. On the one hand, there is no need to add additional counterweights to solve the overall balance problem, ensuring the reduction of the volume and weight of the equipment; on the other hand, by arranging the pump group in a dual-motor multi-pump combination, when the actuator corresponding to a single or part of the pumps fails or needs to be locked, it will not affect the normal operation of the remaining mechanisms of the equipment, and the maintenance mode can be achieved in stages and sides. Thirdly, the left and right arrangements of the motor pump groups in the present application are compact and beautiful, which is more convenient for pipe and wiring requirements than the centralized arrangement of the pump groups, reduces the labor intensity of maintenance personnel, is simpler and more reasonable in structure, and better adapts to the various actuators of the equipment that are also symmetrical. Finally, the present application reasonably arranges the transfer case 102 to output the power of the motor 101 to the pump group of the output shaft at the same time, meet the power requirements of the large-flow pump group, and also reduce the driving mechanism of the equipment, so that the mechanical transmission is more stable, the mechanical reliability is higher, and the power and flow distribution is more uniform, so that the structure of the overall equipment is optimized, the weight can be reduced, and the compactness and aesthetic characteristics of the equipment are improved. In addition, compared with the oil tank arranged on one side, the present application can adopt an oil tank of regular shape, which is not only conducive to the balance of both sides of the equipment, but also brings convenience to the cleaning and maintenance of the oil tank.

[0034] Preferably, the motor 101 is a flameproof three-phase asynchronous motor, which meets the requirements of coal safety certification in some usage scenarios, converts electrical energy into mechanical energy, and provides power for the equipment.

[0035] In a preferred embodiment of the present application, the left motor pump group 3 and the right motor pump group 1 are symmetrically installed on the left and right sides of the hydraulic oil tank 2 .

[0036] In this embodiment, the motor pump group with the transfer case 102 symmetrically arranged on both sides of the hydraulic oil tank 2 is more compact and beautiful in layout, convenient for piping and wiring requirements, simple and reasonable in structure, and better adapted to the various actuators of the equipment itself that are also symmetrical.

[0037] In a preferred embodiment of the present application, the hydraulic oil tank 2 adopts a left-right symmetrical structure along the center line.

[0038] The hydraulic oil tank 2 of this embodiment adopts a left-right symmetrical structure along the center line, so the flow distribution in the hydraulic oil tank 2 is relatively uniform, and there will be no local cavitation phenomenon. Compared with general special-shaped oil tank structures, it is more compact, the processing technology is simpler and more convenient, and the maintenance and cleaning during actual application are also more convenient.

[0039] In a preferred embodiment of the present application, the left motor pump group 3 and the right motor pump group 1 are symmetrically installed on the left and right sides of the hydraulic oil tank 2 along the center line of the hydraulic oil tank 2 .

[0040] The present embodiment provides a feasible solution to the problem of arranging multiple pump groups with large flow requirements. The motor pump groups with transfer cases symmetrically arranged on both sides of the center line of the hydraulic oil tank 2 are compact and beautiful in layout, convenient for piping and wiring requirements, simple and reasonable in structure, and better adapted to the various actuators of the equipment itself that are also symmetrical. At the same time, since the two motor pump groups adopt an overall symmetrical assembly structure along both sides of the hydraulic oil tank 2, the structural strength is high and the overall size is small, which can meet the requirements of underground transportation conditions and complex environments.

[0041] In a preferred embodiment of the present application, each hydraulic pump includes an open pump and a closed pump, wherein the closed pump supplies oil to the actuator in the equipment whose pressure and flow demand are greater than the set value, and the open pump supplies oil to the actuator in the equipment whose pressure and flow demand are less than the set value.

[0042] The pump group arrangement of this embodiment adopts the method of arranging open and closed pumps at the same time. In view of the special needs of hard rock tunneling equipment, the closed pump has high working pressure, high working efficiency, and is easy to realize stepless speed control and two-way control. It is mainly aimed at the cutter head drive system with large pressure and flow requirements; the open pump is mainly responsible for the walking and support systems with relatively ordinary pressure and flow requirements, so as to achieve the reasonable application of hydraulic components, reduce the volume of the oil tank, and avoid excessive waste of pressure and flow.

[0043] In a preferred embodiment of the present application, the transfer case 102 includes a main output end and two auxiliary output ends, the open pump in each hydraulic pump is drivingly connected to the auxiliary output end, and the closed pump in each hydraulic pump is drivingly connected to the main output end.

[0044] Specifically, in one embodiment, each hydraulic pump of the hard rock tunneling equipment includes a first variable displacement piston pump 103, a second variable displacement piston pump 104, a gear pump 105, a third variable displacement piston pump 106, a vane pump 107, and a fourth variable displacement piston pump 108, wherein:

[0045] The function of the first variable displacement piston pump 103 is to provide hydraulic power for the travel drive system, auxiliary system and advance support system of the equipment.

[0046] The function of the second variable displacement piston pump 104 is to provide hydraulic power for the cutter head pilot system of the equipment.

[0047] The gear pump 105 is used to provide flow supplement for various auxiliary devices of the equipment, and at the same time provide power for the circulation cooling of the gear oil of the cutter head of the equipment.

[0048] The function of the third variable displacement piston pump 106 is to provide hydraulic power for the rock drilling impact system installed on the same side of the equipment as the third variable displacement piston pump 106 .

[0049] The vane pump 107 is used to provide flow supplement for the cutter head drive system of the equipment and provide power for circulating cooling of the hydraulic system when the equipment is in standby mode.

[0050] The first variable displacement piston pump 103, the second variable displacement piston pump 104, and the gear pump 105 are open pumps, which are driven by a first integral through shaft connected in series via a spline shaft, and the first integral through shaft is drivingly connected to the auxiliary output end on the right side below the transfer case 102;

[0051] The third variable displacement piston pump 106 and the vane pump 107 are open pumps, which are driven by a second integral through shaft connected in series via a spline shaft, and the second integral through shaft is drivingly connected to the auxiliary output terminal on the left side below the transfer case 102;

[0052] The fourth variable displacement piston pump 108 is a closed pump, and is drivingly connected to the main output end of the transfer case 102 .

[0053] In addition to the above-mentioned embodiments, the present application also includes but is not limited to other three-output shaft transfer cases and multi-pump series arrangements that can also achieve the same functions, such as a two-output shaft transfer case connected in series with multiple hydraulic pumps, etc. Those skilled in the art can make adaptive adjustments based on the basic concept of the present application, which will not be elaborated here.

[0054] In a preferred embodiment of the present application, Figure 3 As shown, the hydraulic oil tank 2 includes a box body 201, and both sides of the box body 201 are respectively provided with a plurality of oil supply interfaces for supplying oil to the hydraulic pumps of the motor pump group on the same side. The box body 201 and the components installed on the box body 201 are arranged symmetrically along the center line of the box body 201. The overall size is small and the structure is beautiful, which is convenient for the piping and wiring requirements of the hydraulic system.

[0055] In the hydraulic system for hard rock tunneling equipment, the oil supply interface includes a first oil suction flange port 203, a second oil suction flange port 204, a third oil suction flange port 205, and a ball valve oil port 206. The box body 201 is the basic structure of the hydraulic oil tank 2 and serves to store hydraulic oil.

[0056] The first oil suction flange port 203 serves to provide an oil suction port for the third variable displacement piston pump 106 .

[0057] The second oil suction flange port 204 is used to provide an oil suction port for the vane pump 107 .

[0058] The function of the third oil suction flange port 205 is to provide hydraulic oil to the first variable displacement piston pump 103 through an oil suction block connected to the oil suction pipe.

[0059] The two ball valve oil ports 206 function to provide oil suction ports for the second variable piston pump 104 and the gear pump 105 .

[0060] In a preferred embodiment of the present application, a cleaning cover 202 is detachably provided on the box body 201 to provide a cleaning port for easy maintenance of the box body 201 .

[0061] In a preferred embodiment of the present application, a weight-reducing groove 208 is concavely provided in the middle of the box body 201, and the weight-reducing groove 208 divides the inner cavity of the box body 201 into two left and right oil-containing chambers. The upper ends of the two oil-containing chambers are connected, and flange openings 207 are respectively provided at the bottom of the left and right sides of the box body 201, and an oil pipeline 4 is connected between the two flange openings 207 to connect the hydraulic oil in the two oil-containing chambers.

[0062] In this embodiment, the flange opening 207 is used to connect the left and right sides of the box body 201 of the hydraulic oil tank 2 by means of the oil pipeline 4, so as to make the flow distribution more uniform and avoid the air suction phenomenon when one side is in motion.

[0063] Another preferred embodiment of the present application further provides an engineering machinery including the dual transfer case hydraulic pump station, wherein the engineering machinery includes hard rock tunneling equipment and the like.

[0064] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A double transfer case hydraulic pump station, characterized in that: include: Hydraulic oil tank (2); The left motor pump group (3) and the right motor pump group (1) are respectively installed on the left and right sides of the hydraulic oil tank (2), and the hydraulic oil tank (2) provides hydraulic oil; The left motor pump group (3) and the right motor pump group (1) both include a motor (101), a transfer case (102), and a plurality of hydraulic pumps; the input end of the transfer case (102) is drivingly connected to the output end of the motor (101); the output end of the transfer case (102) is drivingly connected to the corresponding hydraulic pumps; the input end of each hydraulic pump is connected to a hydraulic oil tank (2); and the output end supplies oil to the corresponding actuator of the equipment.

2. The double transfer case hydraulic pump station according to claim 1, characterized in that: The left motor pump group (3) and the right motor pump group (1) are symmetrically installed on the left and right sides of the hydraulic oil tank (2).

3. The double transfer case hydraulic pump station according to claim 1, characterized in that: The hydraulic oil tank (2) adopts a left-right symmetrical structure along the center line.

4. The double transfer case hydraulic pump station according to claim 3, characterized in that: The left motor pump group (3) and the right motor pump group (1) are symmetrically installed on the left and right sides of the hydraulic oil tank (2) along the center line of the hydraulic oil tank (2).

5. The double transfer case hydraulic pump station according to claim 1, characterized in that: Each hydraulic pump includes an open pump and a closed pump, wherein the closed pump supplies oil to the actuator in the equipment whose pressure and flow demand are greater than the set value, and the open pump supplies oil to the actuator in the equipment whose pressure and flow demand are less than the set value.

6. The double transfer case hydraulic pump station according to claim 5, characterized in that: The transfer case (102) comprises a main output end and at least one auxiliary output end, the open pump in each hydraulic pump is drivingly connected to the auxiliary output end, and the closed pump in each hydraulic pump is drivingly connected to the main output end.

7. The dual transfer case hydraulic pump station according to claim 1, characterized in that: The hydraulic oil tank (2) comprises a box body (201), and two sides of the box body (201) are respectively provided with a plurality of oil supply interfaces for supplying oil to the hydraulic pumps of the motor pump group on the same side.

8. The double transfer case hydraulic pump station according to claim 7, characterized in that: The box body (201) is detachably provided with a cleaning cover (202).

9. The dual transfer case hydraulic pump station according to claim 7, characterized in that: A weight-reducing groove (208) is provided in a concave middle portion of the box body (201), and the weight-reducing groove (208) divides the inner cavity of the box body (201) into two left and right oil-containing cavities. The upper ends of the two oil-containing cavities are connected. A flange opening (207) is provided at the bottom of the left and right sides of the box body (201), and an oil pipeline (4) is connected between the two flange openings (207) to connect the hydraulic oil in the two oil-containing cavities.

10. An engineering machine, characterized in that: It comprises a double transfer case hydraulic pump station as claimed in any one of claims 1 to 9.

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