Overflow oil supplementing valve group for power head motor and mechanical equipment

Abstract

The invention belongs to the field of hydraulic valve banks, and particularly relates to an overflow oil supplementing valve bank for a power head motor and mechanical equipment, one end of a first main oil duct and one end of a second main oil duct of the overflow oil supplementing valve bank are connected with an oil inlet and an oil outlet of the power head motor respectively, and the other end of the first main oil duct and the other end of the second main oil duct are used for being connected with an oil supply system. The first oil return opening is connected with a main oil return path of the oil supply system, and the second oil return opening is connected with an oil drainage opening in the power head motor. The first overflow valve and the second overflow valve limit the maximum pressure of the overflow oil supplementing valve set and the power head motor, the first one-way valve and the second one-way valve conduct oil supplementing when negative pressure occurs in an oil port of the power head motor, and the third one-way valve conducts oil supplementing when the oil drainage pressure of the motor shell exceeds the preset pressure. Oil liquid is guided into the low-pressure side of an oil inlet and an oil outlet of the power head motor nearby, so that the pressure of a motor shell does not exceed preset pressure; the third one-way valve can further supplement oil to the low-pressure sides of the oil inlet and the oil outlet of the power head motor nearby, and air suction is prevented.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic valve groups, and in particular to an overflow and oil replenishment valve group and mechanical equipment for a power head motor. Background Art

[0002] A rotary drilling rig is a kind of engineering machinery mainly used for drilling soil and rocks. It is widely used in underground engineering, infrastructure construction, mining and other fields. The existing rotary drilling rig power head is mainly used to drive the drill rod for drilling operations and drill bucket to throw soil. Once encountering clay, the rotary drilling rig will use the inertial impact of the high-speed frequent forward and reverse rotation of the power head motor to throw soil. Under the fast and frequent inertial impact, if the system oil is not replenished in time or the oil replenishment is insufficient, the power head motor will produce air cavitation, causing motor damage or reducing the service life. The power head motor is driven by high-pressure oil provided by the hydraulic system. The existing functional oil replenishment valve is connected to the power head motor through a pipeline, and the distance of the pipeline connection is relatively long, resulting in the power head motor cannot be replenished in time when it needs to be replenished. In addition, the power head motor has a high oil leakage pressure in the motor housing due to the excessive return oil pressure. Cavitation greatly reduces the service life of the motor, and the housing pressure will cause damage to the skeleton oil seal or oil leakage, which will affect the reliability of the motor.

[0003] In the related technology, for example, the utility model patent with announcement number CN216895123U discloses a special valve group for motor overload oil replenishment, which can timely and effectively unload the pressure to protect the safety of the motor. The oil replenishment valve will also replenish oil in time through self-priming when the motor rotates to prevent the motor from sucking air, but it cannot achieve local pressure relief and local oil replenishment. The utility model with announcement number CN204851828U discloses a rotary buffer oil replenishment device for rotary drilling rigs. Although there are left and right overflow valves respectively connected between the two main oil passages, the left and right overflow valves are respectively connected in series with a hydraulically controlled one-way valve, and the opening and closing states of the two hydraulically controlled one-way valves control whether the overflow valves can function. When there is no high-pressure oil in the A and B oil circuits, the right hydraulic control check valve 4 and the left hydraulic control check valve 6 are in the open state, and the right relief valve 5 or the left relief valve 7 can play a buffering role when the system is under high pressure: when there is high-pressure oil in the A or B oil circuit, the oil inlet pressure of the hydraulic control check valve 4 and the hydraulic control check valve 6 is lower than the hydraulic control port pressure and is in the closed open state, and the relief valve does not work in this state. It plays a buffering role in the emergency stop of the swing to protect the swing motor. It is still impossible to achieve local pressure relief and local oil replenishment.

[0004] To sum up, how to provide an overflow oil-replenishing valve group that can replenish oil in time when the power head motor needs oil replenishment and reduce the oil leakage pressure of the shell when oil is leaking, and mechanical equipment including this overflow oil-replenishing valve group, has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The embodiment of the present application provides an overflow oil-replenishing valve group and mechanical equipment for a power head motor, aiming to achieve local pressure relief and local oil replenishment of the power head motor, better protect the skeleton oil seal, extend its service life, effectively reduce costs, and improve the efficiency of the hydraulic system.

[0006] To this end, according to one aspect of the present application, a relief oil supply valve group for a power head motor is provided, including a valve block and a first relief valve, a second relief valve, a first non-return valve, a second non-return valve and a third non-return valve installed on the valve block, the valve block is provided with a first main oil passage and a second main oil passage that penetrate the valve block, and a first channel, a second channel and a third channel that are located inside the valve block and connect the first main oil passage and the second main oil passage, one end of the first main oil passage and one end of the second main oil passage are used to respectively connect the oil inlet and the oil outlet of the power head motor, the other end of the first main oil passage and the other end of the second main oil passage are used to connect the oil supply system, the first relief valve is located on the first channel and the flow direction of the first relief valve is from the first main oil passage to the second main oil passage, the second relief valve is located in the first channel The oil return channel is connected to the oil pump of the oil pumping station through the oil pumping station, and the oil return channel is connected to the oil pumping station through the oil pumping station.

[0007] Optionally, the opening pressures of the first one-way valve and the second one-way valve do not exceed 0.5 bar, the opening pressure of the third one-way valve does not exceed 0.7 bar, and the opening pressures of the first one-way valve and the second one-way valve are both lower than the opening pressure of the third one-way valve.

[0008] Optionally, the opening pressures of the first relief valve and the second relief valve are both less than 400 bar.

[0009] Optionally, the overflow and oil-filling valve group also includes a first pressure measuring joint, a second pressure measuring joint and a third pressure measuring joint. The valve block is also provided with a first pressure measuring interface, a second pressure measuring interface and a third pressure measuring interface. The first pressure measuring interface is connected to the first main oil channel, and the first pressure measuring joint is installed on the first pressure measuring interface. The second pressure measuring interface is connected to the second main oil channel, and the second pressure measuring joint is installed on the second pressure measuring interface. The third pressure measuring interface is connected to the third channel between the first check valve and the second check valve, and the third pressure measuring joint is installed on the third pressure measuring interface.

[0010] Optionally, the valve block is rectangular, the first main oil channel and the second main oil channel are parallel to each other and both extend from the front side of the valve block to the back side of the valve block, and the valve block is provided with mounting through holes extending through the valve block around the first main oil channel and the second main oil channel.

[0011] Optionally, the first oil return port is located at the front side of the valve block, and the second oil return port is located at the top of the valve block.

[0012] Optionally, the first overflow valve and the first check valve are both inserted at the bottom of the valve block, the second overflow valve and the second check valve are both inserted at the top of the valve block, and the third check valve is inserted at the side of the valve block.

[0013] According to another aspect of the present application, a mechanical device is provided, including a power head motor and the overflow oil supply valve group as described above, wherein the overflow oil supply valve group is installed on the oil inlet and outlet ports of the power head motor, and the second oil return port is connected to an oil drain port on the power head motor.

[0014] The overflow and replenishing valve group and mechanical equipment for the power head motor provided by the present application have the following beneficial effects: compared with the prior art, when the overflow and replenishing valve group for the power head motor of the present application is specifically used, one end of the first main oil channel and one end of the second main oil channel are respectively connected to the oil inlet and oil outlet of the power head motor, the other end of the first main oil channel and the other end of the second main oil channel are used to connect the oil supply system, the first return oil port is connected to the total return oil circuit of the oil supply system, and the second return oil port is connected to an oil drain port on the power head motor. The first overflow valve and the second overflow valve are used to limit the maximum pressure of the overflow and replenishing valve group and the power head motor, the first check valve and the second check valve are used to replenish oil when negative pressure appears in the oil port of the power head motor, and the third check valve can introduce oil to the low-pressure side of the oil inlet and outlet of the power head motor when the oil drain pressure of the motor housing exceeds the preset pressure, thereby limiting the motor housing pressure from exceeding the preset pressure; in addition, the third check valve can also realize the nearby replenishment of oil to the low-pressure side of the oil inlet and outlet of the power head motor, which is beneficial to prevent air suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] in:

[0017] Figure 1 It is a structural schematic diagram of a combination of a relief oil replenishment valve group for a power head motor and a power head motor according to an embodiment of the present application;

[0018] Figure 2 yes Figure 1 The schematic structural diagram of the overflow oil replenishment valve group and the power head motor combination from another perspective shown;

[0019] Figure 3 It is a front structural schematic diagram of a relief oil replenishment valve group for a power head motor shown in one embodiment of the present application;

[0020] Figure 4 It is a schematic diagram of the back structure of a relief oil replenishment valve group for a power head motor shown in one embodiment of the present application;

[0021] Figure 5 It is a schematic diagram of an overflow oil replenishing valve group for a power head motor shown in one embodiment of the present application.

[0022] Description of main component symbols:

[0023] 100. Power head motor;

[0024] 200, overflow oil supply valve group;

[0025] 10. Valve block; 11. First main oil passage; 12. Second main oil passage; 13. First oil return port; 14. Second oil return port; 15. Mounting through hole; 16. Sealing ring;

[0026] 21. First relief valve; 22. Second relief valve;

[0027] 31. First one-way valve; 32. Second one-way valve; 33. Third one-way valve;

[0028] 41. First pressure measuring joint; 42. Second pressure measuring joint; 43. Third pressure measuring joint. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings below. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and 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 therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first", "second" and the like are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0034] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0035] In order to solve the problem of oil leakage and pressure holding in the housing of the power head motor and air suction on the low-pressure side of the main oil port, an embodiment of the present application provides a relief oil replenishment valve group for the power head motor, such as Figure 1-Figure 5 As shown, the overflow and oil replenishing valve group 200 includes a valve block 10 and a first overflow valve 21 , a second overflow valve 22 , a first check valve 31 , a second check valve 32 and a third check valve 33 installed on the valve block 10 .

[0036] The valve block 10 is provided with a first main oil passage 11 and a second main oil passage 12 that penetrate the valve block 10, and a first channel, a second channel and a third channel that are located inside the valve block 10 and connect the first main oil passage 11 and the second main oil passage 12. Figure 5 A1 port in the middle) and one end of the second main oil passage 12 (i.e. Figure 5 The B1 port in the figure is used to connect the oil inlet and oil outlet of the power head motor 100 respectively, and the other end of the first main oil channel 11 (i.e. Figure 5 A port in the middle) and the other end of the second main oil passage 12 (i.e. Figure 5 The B port in the figure is used to connect the oil supply system. The first relief valve 21 is located on the first channel and the flow direction of the first relief valve 21 is from the first main oil channel 11 to the second main oil channel 12. The second relief valve 22 is located on the second channel and the flow direction of the second relief valve 22 is from the second main oil channel 12 to the first main oil channel 11. The first check valve 31 and the second check valve 32 are both located on the third channel. The oil outlet of the first check valve 31 is connected to the first main oil channel 11, and the oil outlet of the second check valve 32 is connected to the second main oil channel 12. The valve block 10 is also provided with a valve block 10. An oil return channel is provided that runs through the valve block 10. The oil return channel is connected to the third channel between the first one-way valve 31 and the second one-way valve 32. The oil return channel forms a first oil return port 13 and a second oil return port 14 at both ends on the valve block 10, respectively. The third one-way valve 33 is located on the oil return channel between the second oil return port 14 and the third channel, and the oil inlet of the third one-way valve 33 is connected to the second oil return port 14. The first oil return port 13 is used to connect to the total oil return circuit of the oil supply system, and the second oil return port 14 is used to connect to an oil drain port on the power head motor 100.

[0037] When the overflow oil replenishment valve group 200 is used, one end of the first main oil passage 11 (i.e. Figure 5 A1 port in the middle) and one end of the second main oil passage 12 (i.e. Figure 5 The B1 port in the figure) is connected to the oil inlet and oil outlet of the power head motor 100 respectively, and the other end of the first main oil channel 11 (i.e. Figure 5 A port in the middle) and the other end of the second main oil passage 12 (i.e. Figure 5The first oil return port 13 is connected to the total oil return line of the oil supply system, and the second oil return port 14 is connected to an oil drain port on the power head motor 100. The first relief valve 21 and the second relief valve 22 are used to limit the maximum pressure of the relief oil replenishment valve group 200 and the power head motor 100. The high-pressure oil in the first main oil channel 11 can be released to the second main oil channel 12 through the first relief valve 21 on the first channel. Similarly, the high-pressure oil in the second main oil channel 12 can be released to the first main oil channel 11 through the second relief valve 22 on the second channel. The first one-way valve 31 and the second one-way valve 32 are used to replenish oil when negative pressure appears at the oil port of the power head motor 100. The third one-way valve 33 can realize that when the oil leakage pressure of the motor housing exceeds the preset pressure, the oil is introduced to the low-pressure side of the oil inlet and outlet of the power head motor 100 nearby, thereby limiting the pressure of the motor housing from exceeding the preset pressure; in addition, the third one-way valve 33 can also realize nearby oil replenishment to the low-pressure side of the oil inlet and outlet of the power head motor 100, which is beneficial to prevent air suction.

[0038] During operation, the overflow oil-supply valve assembly 200 can relieve pressure and replenish oil nearby, thereby reducing the length of the oil drain line and the back pressure of the oil-supply line. Therefore, the skeleton oil seal can be better protected, extending its service life, and effectively reducing costs and improving the efficiency of the hydraulic system.

[0039] In one embodiment, if Figure 5 As shown, the opening pressures of the first one-way valve 31 and the second one-way valve 32 are both less than 0.5 bar, the opening pressure of the third one-way valve 33 is less than 0.7 bar, and the opening pressures of the first one-way valve 31 and the second one-way valve 32 are both less than the opening pressure of the third one-way valve 33. The opening pressures of the first relief valve 21 and the second relief valve 22 are both less than 400 bar.

[0040] In one implementation, taking the opening pressure of the first one-way valve 31 and the second one-way valve 32 as 0.5 bar and the opening pressure of the third one-way valve 33 as 0.7 bar as an example, the first one-way valve 31 and the second one-way valve 32 with an opening pressure of 0.5 bar are used to replenish oil when negative pressure appears at the motor oil port, and the third one-way valve 33 with an opening pressure of 0.7 bar has two functions: when the oil leakage pressure of the motor housing exceeds 0.7 bar, the housing leakage oil is introduced to the low-pressure side of the motor inlet and outlet ports nearby, thereby limiting the housing pressure from exceeding 0.7 bar; the second function of the third one-way valve 33 is to realize the nearby oil replenishment of the low-pressure side oil port of the motor, which is very beneficial for preventing air suction.

[0041] In one embodiment, if Figure 3-Figure 5As shown, the overflow and oil-filling valve group 200 also includes a first pressure measuring joint 41, a second pressure measuring joint 42 and a third pressure measuring joint 43. The valve block 10 is also provided with a first pressure measuring interface, a second pressure measuring interface and a third pressure measuring interface. The first pressure measuring interface is connected to the first main oil channel 11, the first pressure measuring joint 41 is installed on the first pressure measuring interface, the second pressure measuring interface is connected to the second main oil channel 12, the second pressure measuring joint 42 is installed on the second pressure measuring interface, the third pressure measuring interface is connected to the third channel between the first one-way valve 31 and the second one-way valve 32, and the third pressure measuring joint 43 is installed on the third pressure measuring interface.

[0042] The oil pressure in the first main oil channel 11 can be measured by a pressure gauge through the first pressure measuring interface, the oil pressure in the second main oil channel 12 can be measured by a pressure gauge through the second pressure measuring interface, and the oil pressure in the return oil channel can be measured by a pressure gauge through the third pressure measuring interface.

[0043] Specifically, the first pressure measuring interface, the second pressure measuring interface and the third pressure measuring interface are respectively located at the top and two side surfaces of the rectangular valve block 10 .

[0044] In one embodiment, if Figure 1-Figure 4 As shown, the valve block 10 is a rectangular body, the first main oil channel 11 and the second main oil channel 12 are parallel to each other and both penetrate from the front side of the valve block 10 to the back side of the valve block 10, and the valve block 10 is provided with mounting through holes 15 that penetrate the valve block 10 and surround the first main oil channel 11 and the second main oil channel 12.

[0045] Thus, the valve block 10 has a regular shape, which is convenient for processing, manufacturing and external installation. The function of the installation through hole 15 is to realize the installation and fixation between the valve block 10 and the power head motor 100 and the reversing valve of the oil supply system.

[0046] In order to improve the sealing performance of the connection between the valve block 10 and the power head motor 100 , sealing rings 16 are provided on the back of the valve block 10 around the first main oil passage 11 and the second main oil passage 12 .

[0047] Furthermore, the first oil return port 13 is located at the front of the valve block 10 , and the second oil return port 14 is located at the top of the valve block 10 .

[0048] Preferably, the first overflow valve 21 and the first check valve 31 are both inserted at the bottom of the valve block 10, the second overflow valve 22 and the second check valve 32 are both inserted at the top of the valve block 10, and the third check valve 33 is inserted at the side of the valve block 10. This arrangement ensures that the front and back of the valve block 10 are both planes without protruding structures, which is convenient for external fitting installation. It can be understood that in other embodiments, the arrangement positions of the first overflow valve 21, the first check valve 31, the second overflow valve 22, the second check valve 32 and the third check valve 33 can be adjusted as needed, and are not limited to the above arrangement.

[0049] In addition, an embodiment of the present application also provides a mechanical device, including a power head motor 100 and an overflow oil supply valve group 200 in any of the above embodiments, the overflow oil supply valve group 200 is installed on the oil inlet and outlet ports of the power head motor 100, and the second oil return port 14 is connected to an oil drain port on the power head motor 100.

[0050] In a conventional hydraulic system, only one oil drain port of the power head motor 100 is used, that is, directly connected to the oil tank, and the other oil drain port is usually closed with a screw plug. In the embodiment of the present application, the closed oil drain port is opened and connected to the second oil return port 14 on the valve block 10.

[0051] It can be understood that the mechanical equipment in the embodiments of the present application includes but is not limited to rotary drilling rigs, milling machines, crushers and other rotating equipment or tools.

[0052] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A relief oil supply valve group for a power head motor, characterized in that: The invention comprises a valve block and a first overflow valve, a second overflow valve, a first check valve, a second check valve and a third check valve installed on the valve block, the valve block is provided with a first main oil passage and a second main oil passage penetrating the valve block, and a first channel, a second channel and a third channel located inside the valve block and connecting the first main oil passage and the second main oil passage, one end of the first main oil passage and one end of the second main oil passage are used to respectively connect the oil inlet and the oil outlet of the power head motor, the other end of the first main oil passage and the other end of the second main oil passage are used to connect the oil supply system, the first overflow valve is located on the first channel and the flow direction of the first overflow valve is from the first main oil passage to the second main oil passage, the second overflow valve is located on the second channel and the flow direction of the second overflow valve is from the first main oil passage to the second main oil passage From the second main oil passage to the first main oil passage, the first one-way valve and the second one-way valve are both located on the third channel, the oil outlet of the first one-way valve is connected to the first main oil passage, and the oil outlet of the second one-way valve is connected to the second main oil passage. The valve block is also provided with an oil return passage that runs through the valve block, and the oil return passage is connected to the third channel between the first one-way valve and the second one-way valve. The oil return passage forms a first oil return port and a second oil return port at both ends of the valve block, respectively. The third one-way valve is located on the oil return channel between the second oil return port and the third channel, and the oil inlet of the third one-way valve is connected to the second oil return port. The first oil return port is used to connect to the total oil return circuit of the oil supply system, and the second oil return port is used to connect to an oil drain port on the power head motor.

2. The overflow oil replenishment valve group according to claim 1, characterized in that: The opening pressures of the first one-way valve and the second one-way valve do not exceed 0.5 bar, the opening pressure of the third one-way valve does not exceed 0.7 bar, and the opening pressures of the first one-way valve and the second one-way valve are both lower than the opening pressure of the third one-way valve.

3. The overflow oil replenishment valve group according to claim 1, characterized in that: The opening pressures of the first relief valve and the second relief valve are both less than 400 bar.

4. The overflow oil replenishment valve group according to claim 1, characterized in that: The overflow and oil-filling valve group also includes a first pressure measuring joint, a second pressure measuring joint and a third pressure measuring joint. The valve block is also provided with a first pressure measuring interface, a second pressure measuring interface and a third pressure measuring interface. The first pressure measuring interface is connected to the first main oil channel, the first pressure measuring joint is installed on the first pressure measuring interface, the second pressure measuring interface is connected to the second main oil channel, the second pressure measuring joint is installed on the second pressure measuring interface, the third pressure measuring interface is connected to the third channel between the first check valve and the second check valve, and the third pressure measuring joint is installed on the third pressure measuring interface.

5. The overflow oil replenishment valve assembly according to any one of claims 1 to 4, characterized in that: The valve block is rectangular, the first main oil channel and the second main oil channel are parallel to each other and both extend from the front side of the valve block to the back side of the valve block, and the valve block is provided with mounting through holes extending through the valve block around the first main oil channel and the second main oil channel.

6. The overflow oil replenishment valve assembly according to claim 5, characterized in that: The first oil return port is located at the front side of the valve block, and the second oil return port is located at the top of the valve block.

7. The overflow oil replenishment valve assembly according to claim 5, characterized in that: The first overflow valve and the first check valve are both inserted at the bottom of the valve block, the second overflow valve and the second check valve are both inserted at the top of the valve block, and the third check valve is inserted at the side of the valve block.

8. A mechanical device, characterized in that: It comprises a power head motor and an overflow oil-supplementing valve group as described in any one of claims 1 to 7, wherein the overflow oil-supplementing valve group is installed on the oil inlet and outlet of the power head motor, and the second oil return port is connected to an oil drain port on the power head motor.

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