Hydraulic motor buffer balance system and rotary hearth mechanical transmission device

Abstract

The utility model provides a hydraulic motor buffer balance system and a rotary hearth mechanical transmission device, which relate to the field of hydraulic motor balancers, and comprise a hydraulic motor, an oil return tank, a buffer balance loop and a control loop, the hydraulic motor communicates with an oil return tank; the buffer balance loop comprises a forward buffer balance loop and a reverse buffer balance loop; the forward buffer balance loop comprises a forward balance oil way and a first overflow valve, and an oil drainage port of the first overflow valve is communicated with the oil return tank; the reverse buffer balance loop comprises a reverse balance oil way and a second overflow valve, and an oil drainage port of the second overflow valve is communicated with the oil return tank. According to the hydraulic motor speed reducer, pressure adjustment of the hydraulic motor forward oil inlet and the motor forward oil outlet is achieved through the first overflow valve and the second overflow valve, so that stable transmission of the hydraulic motor speed reducer is guaranteed, impact is reduced, and therefore the rotary hearth machine operates more stably.

Description

Technical Field

[0001] The present application relates to the field of hydraulic motor balancers, and in particular to a hydraulic motor buffer balancing system and a rotary bottom mechanical transmission device. Background Art

[0002] Rotary hearth mechanical transmissions are mainly used in rotary beds, rotary hearth furnaces or annular furnaces and other related settings.

[0003] Prior art, in a Chinese patent with publication number CN101482088A, entitled A distributor for an axial piston variable hydraulic motor, a distributor body is integrated with a hydraulic motor. In addition to the existing general functions, the distributor is also provided with a variable control device and a brake control device for the hydraulic motor. The two inlets of the second shuttle valve SF2 of the variable control device are connected to the hydraulic oil inlet and outlet oil circuits A and B, and the outlet is connected to the two-position three-way valve HXF and controls the variable servo device CF of the hydraulic motor through a throttle valve ZN. The two inlets of the second shuttle valve SF1 of the brake control device are connected to the hydraulic oil inlet and outlet oil circuits A and B, and the outlet is connected to the one-way throttle valve DFF to control the brake device ZD of the hydraulic motor.

[0004] In the above manner, since there is no independent oil return interface and pipeline, when adjusting the inlet and outlet pressures of the hydraulic motor, they will interfere with each other, causing unstable operation of the transmission device and the rotary bottom machinery. Utility Model Content

[0005] In order to solve the above problems, the present application provides a hydraulic motor buffer balancing system and a rotary bottom mechanical transmission device.

[0006] To solve the above problems, the technical solution of the utility model is:

[0007] A hydraulic motor buffer balance system and a rotary bottom mechanical transmission device, comprising:

[0008] Hydraulic motor, oil return tank, buffer balance circuit and control circuit;

[0009] The hydraulic motor is connected to the oil return tank and is used to extract the oil in the oil return tank;

[0010] The buffer balancing circuit includes a forward buffer balancing circuit and a reverse buffer balancing circuit; the forward buffer balancing circuit includes a forward balancing oil circuit and a first overflow valve, the first end of the forward balancing oil circuit is connected to the forward oil outlet of the hydraulic motor, the second end of the forward balancing oil circuit is connected to the forward oil inlet of the control circuit, the first overflow valve oil inlet is connected to the first end of the forward balancing oil circuit, and the first overflow valve oil drain is connected to the return oil tank; the reverse buffer balancing circuit includes a reverse balancing oil circuit and a second overflow valve, the first end of the reverse balancing oil circuit is connected to the forward oil inlet of the hydraulic motor, the second end of the reverse balancing oil circuit is connected to the forward oil outlet of the control circuit, the second overflow valve oil inlet is connected to the first end of the reverse balancing oil circuit, and the second overflow valve oil drain is connected to the return oil tank.

[0011] In the hydraulic motor buffer balancing system of the utility model, the pressure value of the second overflow valve is higher than the pressure value of the forward oil inlet of the hydraulic motor.

[0012] The hydraulic motor buffer balancing system of the utility model, the forward buffer balancing circuit also includes a first one-way valve, the oil inlet of the first one-way valve is connected to the oil drain port of the first overflow valve, and the oil outlet of the first one-way valve is connected to the second end of the forward balancing oil circuit.

[0013] The hydraulic motor buffer balancing system of the utility model, the reverse buffer balancing circuit also includes a second one-way valve, the oil inlet of the second one-way valve is connected to the oil drain port of the second overflow valve, and the oil outlet of the second one-way valve is connected to the second end of the reverse balancing oil circuit.

[0014] The hydraulic motor buffer balancing system of the utility model, the control circuit includes a forward control oil circuit, a reverse control oil circuit, a proportional reversing valve and a connecting oil circuit;

[0015] The first end of the forward control oil circuit is connected to the second end of the forward balance oil circuit, the second end of the forward control oil circuit is connected to the first working oil port of the proportional reversing valve, and the connecting oil circuit is connected to the P port and T port of the proportional reversing valve; the first end of the reverse control oil circuit is connected to the second working oil port of the proportional reversing valve, and the second end of the reverse control oil circuit is connected to the second end of the reverse balance oil circuit.

[0016] The hydraulic motor buffer balancing system of the utility model, the control circuit also includes a pressure compensator, the two oil inlets of the pressure compensator are respectively connected to the forward control oil circuit and the reverse control oil circuit, and the oil outlet of the pressure compensator is connected to the connecting oil circuit.

[0017] The hydraulic motor buffer balancing system of the utility model, the control circuit also includes a pressure compensator, the pressure compensator includes a shuttle valve and a pressure reducing valve; the oil inlets at both ends of the shuttle valve are respectively connected to the forward control oil circuit and the reverse control oil circuit, the oil outlet of the shuttle valve is connected to the oil inlet of the pressure reducing valve, and the oil outlet of the pressure reducing valve is connected to the connecting oil circuit.

[0018] In the hydraulic motor buffer balancing system of the utility model, the pressure value of the first overflow valve is A, and the value range of A is [1, 5] MPa.

[0019] In the hydraulic motor buffer balancing system of the utility model, the proportional reversing valve adopts the specification form of the middle position function W6.

[0020] A rotary bottom mechanical transmission device comprises the hydraulic motor buffer balancing system.

[0021] Due to the adoption of the above technical solution, the utility model has the following advantages and positive effects compared with the prior art:

[0022] This proposal applies to adjust the pressure of the motor's forward oil inlet and the motor's forward oil outlet through the first relief valve and the second relief valve to ensure smooth transmission of the hydraulic motor reducer and reduce impact, thereby making the rotary bottom machinery run more smoothly.

[0023] This proposal applies to replenish oil to the motor oil inlet and motor oil outlet through the first one-way valve and the second one-way valve to ensure that the hydraulic motor lacks oil when it is parked or in a fault state, thereby preventing destructive failure of the hydraulic motor reducer, and at the same time increasing the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the hydraulic motor buffer balancing system according to the embodiment of the present application

[0025] Explanation of the reference numerals in the accompanying drawings: 1. Hydraulic motor; 2. Oil return tank; 3. Forward balancing oil circuit; 4. First overflow valve; 5. First non-return valve; 6. Reverse balancing oil circuit; 7. Second overflow valve; 8. Second non-return valve; 9. Forward control oil circuit; 10. Reverse control oil circuit; 11. Proportional reversing valve; 12. Connecting oil circuit; 13. Shuttle valve; 14. Pressure reducing valve. DETAILED DESCRIPTION

[0026] The following is a further detailed description of a hydraulic motor buffer balancing system and a rotary bottom mechanical transmission device proposed by the utility model in combination with the accompanying drawings and specific embodiments. The advantages and features of the utility model will become clearer according to the following description.

[0027] Embodiment 1:

[0028] See also Figure 1The present application provides a hydraulic motor buffer balancing system, including a hydraulic motor 1, a return oil tank 2, a buffer balancing circuit and a control circuit; the hydraulic motor 1 is connected to the return oil tank 2 for extracting the oil in the return oil tank 2; the buffer balancing circuit includes a forward buffer balancing circuit and a reverse buffer balancing circuit; the forward buffer balancing circuit includes a forward balancing oil circuit 3 and a first overflow valve 4, the first end of the forward balancing oil circuit 3 is connected to the forward oil outlet of the hydraulic motor 1, the second end of the forward balancing oil circuit 3 is connected to the forward oil inlet of the control circuit, the oil inlet of the first overflow valve 4 is connected to the first end of the forward balancing oil circuit 3, and the oil drain port of the first overflow valve 4 is connected to the return oil tank 2; the reverse buffer balancing circuit includes a reverse balancing oil circuit 6 and a second overflow valve 7, the first end of the reverse balancing oil circuit 6 is connected to the forward oil inlet of the hydraulic motor 1, the second end of the reverse balancing oil circuit 6 is connected to the forward oil outlet of the control circuit, the oil inlet of the second overflow valve 7 is connected to the first end of the reverse balancing oil circuit 6, and the oil drain port of the second overflow valve 7 is connected to the return oil tank 2.

[0029] To further explain the operating principle, the hydraulic motor 1 rotates forward, enters the forward balance oil circuit 3, enters the forward control oil circuit 9, passes through the control circuit, enters the reverse control oil circuit 10, and enters the reverse balance oil circuit 6. Oil circulation is realized. The hydraulic motor 1 rotates backward, enters the reverse balance oil circuit 6, enters the reverse control oil circuit 10, passes through the control circuit, enters the forward control oil circuit 9, and enters the forward balance oil circuit 3, realizing oil circulation.

[0030] It is further explained that the set pressure value of the first relief valve 4 is less than the set pressure value of the second relief valve 7; and the pressure value of the second relief valve 7 is higher than the pressure value of the forward oil inlet of the hydraulic motor 1, and the first relief valve 4 is adjusted to a specific value. When the hydraulic motor 1 works at a stable speed for a long time without interruption, when it is subjected to hydraulic shock or the rotary bottom machinery is overloaded, the fluctuation of the inlet pressure of the hydraulic motor 1 will be filtered by the second relief valve 7 to ensure that the oil inlet pressure of the hydraulic motor 1 is constant; at the same time, the second relief valve 7 is automatically adjusted to ensure that the oil outlet pressure of the hydraulic motor 1 is stable; so that the hydraulic motor 1 of the rotary bed rotary bottom device is in a stable pressure difference for a long time, thereby ensuring the long-term stable operation of the rotary bottom machinery.

[0031] The specific structure of the hydraulic motor buffer balance system of this embodiment is further described below:

[0032] In this embodiment, the forward buffer balancing circuit also includes a first one-way valve 5 , the oil inlet of the first one-way valve 5 is connected to the oil drain port of the first overflow valve 4 , and the oil outlet of the first one-way valve 5 is connected to the second end of the forward balancing oil circuit 3 .

[0033] In this embodiment, the reverse buffer balancing circuit also includes a second one-way valve 8, the oil inlet of the second one-way valve 8 is connected to the oil drain port of the second overflow valve 7, and the oil outlet of the second one-way valve 8 is connected to the second end of the reverse balancing oil circuit 6.

[0034] To further explain, when the hydraulic motor 1 is short of oil due to inertia or fault condition caused by the mechanical parking at the bottom, the second one-way valve 8 can be used to replenish oil to the oil inlet of the hydraulic motor 1, and the first one-way valve 5 can be used to replenish oil to the oil outlet of the hydraulic motor 1, thereby avoiding destructive accidents to the hydraulic motor 1 and the reducer, and at the same time increasing the service life of the equipment.

[0035] In this embodiment, the control circuit includes a forward control oil circuit 9, a reverse control oil circuit 10, a proportional reversing valve 11 and a connecting oil circuit 12;

[0036] The first end of the forward control oil circuit 9 is connected to the second end of the forward balancing oil circuit 3, the second end of the forward control oil circuit 9 is connected to the first working oil port of the proportional reversing valve 11, and the two ends of the connecting oil circuit 12 are respectively connected to the P port and the T port of the proportional reversing valve 11; the first end of the reverse control oil circuit 10 is connected to the second working oil port of the proportional reversing valve 11, and the second end of the reverse control oil circuit 10 is connected to the second end of the reverse balancing oil circuit 6.

[0037] In this embodiment, the control circuit further includes a pressure compensator, the two oil inlets of the pressure compensator are respectively connected to the forward control oil circuit 9 and the reverse control oil circuit 10 , and the oil outlet of the pressure compensator is connected to the connecting oil circuit 12 .

[0038] In this embodiment, the control circuit also includes a pressure compensator, which includes a shuttle valve 13 and a pressure reducing valve 14; the oil inlets at both ends of the shuttle valve 13 are respectively connected to the forward control oil circuit 9 and the reverse control oil circuit 10, the oil outlet of the shuttle valve 13 is connected to the oil inlet of the pressure reducing valve 14, and the oil outlet of the pressure reducing valve 14 is connected to the connecting oil circuit 12.

[0039] In this embodiment, the pressure value of the first relief valve 4 is A, and the value range of A is [1, 5] MPa. Preferably, the pressure value of the first relief valve 4 is preset to 2 MPa, which can of course be adjusted according to the time and working conditions on site.

[0040] In this embodiment, the proportional reversing valve 11 adopts the specification form of the middle position function W6.

[0041] To further explain, depending on the working conditions, such as the requirement for the hydraulic motor 1 to rotate in the reverse direction for a short period of time, the proportional reversing valve adopts the form of the middle position function W6.

[0042] Further explanation: from the perspective of continuous long-term operation of the hydraulic motor, in order to avoid cumulative errors, the proportional reversing valve uses a valve core with position feedback to facilitate anchoring the valve core opening degree.

[0043] To sum up the above, the hydraulic motor 1 rotates forward, enters the forward balance oil circuit 3, enters the forward control oil circuit 9, enters the first working oil port of the proportional reversing valve 11, flows out from the T port of the proportional reversing valve 11, enters the connecting oil circuit 12, then enters from the P port of the proportional reversing valve 11, flows out from the second working oil port of the proportional reversing valve 11, enters the reverse control oil circuit 10, and enters the reverse balance oil circuit 6.

[0044] The hydraulic motor 1 reverses, enters the reverse balancing oil circuit 6, enters the reverse control oil circuit 10, enters the second working oil port of the proportional reversing valve 11, flows out from the T port of the proportional reversing valve 11, enters the connecting oil circuit 12, then enters from the P port of the proportional reversing valve 11, flows out from the first working oil port of the proportional reversing valve 11, enters the forward control oil circuit 9, and enters the reverse balancing oil circuit 3.

[0045] Among them, the pressure compensator adjustment is used to implement the feedback of the pressure value of the forward control oil circuit 9 and the reverse control oil circuit 10; wherein the shuttle valve 13 and the pressure reducing valve 14 are interrelated, when the pressure value of the forward control oil circuit 9 or the reverse control oil circuit 10 increases, the oil is adjusted through the pressure reducing valve 14.

[0046] During the overall installation, the buffer balance circuit is an integral module, in which the first end of the forward balance oil circuit is the B2 interface, and the second end is the B1 interface; the first end of the reverse balance oil circuit of the buffer balance circuit is the A2 interface, and the second end is the A1 interface. Among them, the B2 interface is flange-connected to the forward oil outlet of the hydraulic motor, and the A2 interface is flange-connected to the forward oil inlet of the hydraulic motor.

[0047] The control loop is an integral module, wherein the first end of the forward control oil circuit is the B0 interface, and the second end is the A0 interface; the B0 interface is connected to the B1 interface, and the A0 interface is connected to the A1 interface.

[0048] Embodiment 2:

[0049] The present application provides a rotary bottom mechanical transmission device, including a hydraulic motor buffer balance system;

[0050] The hydraulic motor buffer balancing system includes a hydraulic motor 1, a return oil tank 2, a buffer balancing circuit and a control circuit; the hydraulic motor 1 is connected to the return oil tank 2 for extracting the oil in the return oil tank 2; the buffer balancing circuit includes a forward buffer balancing circuit and a reverse buffer balancing circuit; the forward buffer balancing circuit includes a forward balancing oil circuit 3 and a first overflow valve 4, the first end of the forward balancing oil circuit 3 is connected to the forward oil outlet of the hydraulic motor 1, the second end of the forward balancing oil circuit 3 is connected to the forward oil inlet of the control circuit, the oil inlet of the first overflow valve 4 is connected to the first end of the forward balancing oil circuit 3, and the oil drain of the first overflow valve 4 is connected to the return oil tank 2; the reverse buffer balancing circuit includes a reverse balancing oil circuit 6 and a second overflow valve 7, the first end of the reverse balancing oil circuit 6 is connected to the forward oil inlet of the hydraulic motor 1, the second end of the reverse balancing oil circuit 6 is connected to the forward oil outlet of the control circuit, the oil inlet of the second overflow valve 7 is connected to the first end of the reverse balancing oil circuit 6, and the oil drain of the second overflow valve 7 is connected to the return oil tank 2.

[0051] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A hydraulic motor buffer balancing system, characterized in that: include: Hydraulic motor, oil return tank, buffer balance circuit and control circuit; The hydraulic motor is connected to the oil return tank and is used to extract the oil in the oil return tank; The buffer balancing circuit includes a forward buffer balancing circuit and a reverse buffer balancing circuit; the forward buffer balancing circuit includes a forward balancing oil circuit and a first overflow valve, the first end of the forward balancing oil circuit is connected to the forward oil outlet of the hydraulic motor, the second end of the forward balancing oil circuit is connected to the forward oil inlet of the control circuit, the oil inlet of the first overflow valve is connected to the first end of the forward balancing oil circuit, and the oil drain of the first overflow valve is connected to the return oil tank; the reverse buffer balancing circuit includes a reverse balancing oil circuit and a second overflow valve, the first end of the reverse balancing oil circuit is connected to the forward oil inlet of the hydraulic motor, the second end of the reverse balancing oil circuit is connected to the forward oil outlet of the control circuit, the oil inlet of the second overflow valve is connected to the first end of the reverse balancing oil circuit, and the oil drain of the second overflow valve is connected to the return oil tank.

2. The hydraulic motor buffer balancing system according to claim 1, characterized in that: The pressure value of the second relief valve is higher than the pressure value of the forward oil inlet of the hydraulic motor.

3. The hydraulic motor buffer balancing system according to claim 1, characterized in that: The forward buffer balance circuit also includes a first one-way valve, an oil inlet of the first one-way valve is connected to an oil drain port of the first overflow valve, and an oil outlet of the first one-way valve is connected to a second end of the forward balance oil circuit.

4. The hydraulic motor buffer balancing system according to claim 3, characterized in that: The reverse buffer balance circuit also includes a second one-way valve, an oil inlet of the second one-way valve is connected to an oil drain port of the second overflow valve, and an oil outlet of the second one-way valve is connected to a second end of the reverse balance oil circuit.

5. The hydraulic motor buffer balancing system according to claim 1, characterized in that: The control circuit includes a forward control oil circuit, a reverse control oil circuit, a proportional reversing valve and a connecting oil circuit; The first end of the forward control oil circuit is connected to the second end of the forward balance oil circuit, the second end of the forward control oil circuit is connected to the first working oil port of the proportional reversing valve, and the two ends of the connecting oil circuit are respectively connected to the P port and the T port of the proportional reversing valve; The first end of the reverse control oil circuit is connected to the second working oil port of the proportional reversing valve, and the second end of the reverse control oil circuit is connected to the second end of the reverse balancing oil circuit.

6. The hydraulic motor buffer balancing system according to claim 5, characterized in that: The control circuit further comprises a pressure compensator, wherein two oil inlets of the pressure compensator are respectively connected to the forward control oil circuit and the reverse control oil circuit, and an oil outlet of the pressure compensator is connected to the connecting oil circuit.

7. The hydraulic motor buffer balancing system according to claim 6, characterized in that: The pressure compensator includes a shuttle valve and a pressure reducing valve; the oil inlets at both ends of the shuttle valve are respectively connected to the forward control oil circuit and the reverse control oil circuit, the oil outlet of the shuttle valve is connected to the oil inlet of the pressure reducing valve, and the oil outlet of the pressure reducing valve is connected to the connecting oil circuit.

8. The hydraulic motor buffer balancing system according to claim 2, characterized in that: The pressure value of the first overflow valve is A, and the value range of A is [1, 5] MPa.

9. The hydraulic motor buffer balancing system according to claim 5, characterized in that: The proportional reversing valve adopts the specification form of the mid-position function W6.

10. A rotary bottom mechanical transmission device, characterized in that: A hydraulic motor buffer balancing system comprising any one of claims 1 to 9.

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