CN201372799Y - A hydraulic device for shield cutter head - Google Patents

Abstract

The utility model relates to a hydraulic device for a shield cutterhead comprising a motor, a proportional variable pump, a check valve, a pilot overflow valve, a speed regulating valve, a power limiting valve, a proportional relief valve, a two-way cartridge valve, a two-position three-way reversing valve, a three-position four-way reversing valve, an oil distribution valve block and a two-point-controlled bidirectional variable motor. The system utilizes a combination of large-discharge capacity main-drive proportional variable pump sets and small-discharge capacity auxiliary-drive proportional variable pump sets to drive the shield cutterhead to move, and a control mode is an electric proportional variable control. The speed of the cutterhead can be continuously regulated in a wide range by the discharge capacity control of the proportional pump sets. The switching between high-gears and low-gears can be implemented by the discharge capacity control of the two-point-controlled bidirectional variable motor. The hydraulic device has the advantages that the installation power is proper; the hydraulic pumps can be combined flexibly; under the normal working condition, the load ratio of a single hydraulic pump is high; and the efficiency of the power source is improved, the reliability is increased and the energy conservation effect of the system is excellent.

Description

A hydraulic device for shield cutter head

technical field

The utility model belongs to the technical field of machinery and relates to a fluid pressure actuator, in particular to a shield cutter head hydraulic device driven by a multi-pump combination.

Background technique

With the development of modern society, human beings are increasingly developing underground space, and the demands of various tunnel projects put forward higher requirements for construction technology, which promotes the development of tunnel construction technology. Modern shield machines can not only realize underground excavation, but also have safety, fast excavation speed, and high degree of automation. They can already be used in tunnel excavation in various soil and soft rock formations. With the development of science and technology and social progress, shield tunneling will gradually replace traditional methods.

The cutterhead driving device is an important part of the excavation function of the shield tunneling machine, which drives the cutterhead to rotate and cut the soil in front of the shield. At present, the cutter head drive is a typical high-power, multi-actuator system. Due to the complex and changeable geological conditions during the excavation process, the cutter head drive device must meet the needs of various stratum excavations from soft soil to hard rock, and the speed varies widely. The variable pump-variable motor volume speed regulation circuit combines the variable pump and the variable motor to continuously adjust the speed in a wide range. At present, this kind of hydraulic speed control circuit is widely used in the world. Usually, several large-displacement variable pumps jointly drive several variable motors, and are controlled centrally through electronic control or hydraulic control proportional technology to realize simultaneous variable displacement of each pump. Constant power control and variable displacement control of each motor. This drive scheme is characterized by fewer components in the hydraulic system and simple control, but the efficiency of the power source is relatively low. However, the combined power source of the main drive pump and the auxiliary drive pump can reduce the cost of component procurement, improve the efficiency of the power source, and increase the reliability, although the control is more complicated, which is more suitable for my country's national conditions.

Contents of the invention

The purpose of the utility model is to provide a shield cutter head hydraulic device driven by multi-pump combination, which can meet the requirements of speed regulation of the shield cutter head, improvement of power source efficiency and energy saving.

The utility model comprises a fuel tank, a first motor, a second motor, a third motor, a fourth motor, a fifth motor, a first proportional variable pump, a second proportional variable pump, a third proportional variable pump, a fourth proportional variable pump, The fifth proportional variable pump, the first two-way cartridge valve, the second two-way cartridge valve, the third two-way cartridge valve, the fourth two-way cartridge valve, the fifth two-way cartridge valve, the first pilot overflow Flow valve, second pilot relief valve, first two-point control bidirectional variable motor, second two-point control bidirectional variable motor, third two-point control bidirectional variable motor, fourth two-point control bidirectional variable motor, The fifth two-point control bidirectional variable motor, the sixth two-point control bidirectional variable motor, the seventh two-point control bidirectional variable motor, the eighth two-point control bidirectional variable motor, two-position three-way reversing valve, three-position Four-way reversing valve, power limiting valve, proportional relief valve, speed regulating valve.

The first motor is rigidly connected to the first proportional variable pump through a coupling, the oil inlet of the first proportional variable pump communicates with the oil tank, the oil outlet of the first proportional variable pump communicates with the oil inlet of the first one-way valve, The oil outlet of the first one-way valve is respectively connected with the first oil port of the fifth two-way cartridge valve, the oil inlet port of the sixth one-way valve, the first oil port of the second two-way cartridge valve, the third two-way The first oil port of the through-cartridge valve is connected with the first oil port of the three-position four-way reversing valve;

The second motor is rigidly connected to the second proportional variable pump through a coupling, the oil inlet of the second proportional variable pump communicates with the oil tank, and the oil outlet of the second proportional variable pump communicates with the oil inlet of the second one-way valve. The oil outlet of the second one-way valve is respectively connected with the first oil port of the fifth two-way cartridge valve, the oil inlet port of the sixth one-way valve, the first oil port of the second two-way cartridge valve, the third two-way The first oil port of the through-cartridge valve is connected with the first oil port of the three-position four-way reversing valve;

The third motor is rigidly connected to the third proportional variable pump through a coupling, the oil inlet of the third proportional variable pump is connected to the oil tank, the oil outlet of the third proportional variable pump is connected to the oil inlet of the third one-way valve, The oil outlet of the third one-way valve is respectively connected with the first oil port of the fifth two-way cartridge valve, the oil inlet port of the sixth one-way valve, the first oil port of the second two-way cartridge valve, the third two-way The first oil port of the through-cartridge valve is connected with the first oil port of the three-position four-way reversing valve;

The fourth motor is rigidly connected to the fourth proportional variable pump through a coupling, the oil inlet of the fourth proportional variable pump is connected to the oil tank, and the oil outlet of the fourth proportional variable pump is connected to the oil inlet of the fourth one-way valve. The oil outlet of the fourth one-way valve is respectively connected with the first oil port of the fifth two-way cartridge valve, the oil inlet port of the sixth one-way valve, the first oil port of the second two-way cartridge valve, the third two-way The first oil port of the through-cartridge valve is connected with the first oil port of the three-position four-way reversing valve;

The second oil port of the fifth two-way cartridge valve is connected with the oil tank, and the third oil port of the fifth two-way cartridge valve is connected with the first oil port of the two-position three-way reversing valve; the two-position three-way reversing The second oil port of the valve is connected with the oil inlet of the first pilot relief valve, and the oil outlet of the first pilot relief valve is connected with the oil tank; the third oil port of the two-position three-way reversing valve is connected with the second pilot The oil inlet port of the relief valve is connected, and the oil outlet port of the second pilot relief valve is connected with the fuel tank; the oil outlet port of the sixth check valve is connected with the second oil port of the power limiting valve; the first two-way cartridge The first oil port of the valve communicates with the second oil port of the second two-way cartridge valve; the second oil port of the first two-way cartridge valve communicates with the oil tank; the third oil port of the first two-way cartridge valve communicates with the The third oil port of the three-position four-way reversing valve is connected; the second oil port of the second two-way cartridge valve is connected with the oil port at one end of the first oil distribution valve block; the third oil port of the second two-way cartridge valve is connected It communicates with the second oil port of the three-position four-way reversing valve; the second oil port of the third two-way cartridge valve communicates with the oil port at one end of the second oil distribution valve block; the third oil port of the third two-way cartridge valve The port is connected with the third oil port of the three-position four-way reversing valve; the first oil port of the fourth two-way cartridge valve is connected with the second oil port of the third two-way cartridge valve; the fourth two-way cartridge valve The second oil port of the fourth two-way cartridge valve is connected with the second oil port of the three-position four-way reversing valve; the fourth oil port of the three-position four-way reversing valve is connected with the fuel tank Connected; the other end oil port of the first oil distribution valve block is respectively connected with the first oil port of the first two-point control bidirectional variable motor, the first oil port of the second two-point control bidirectional variable motor, and the third two-point control The first oil port of the type two-way variable variable motor, the first oil port of the fourth two-point control type bidirectional variable motor, the first oil port of the fifth two-point control type bidirectional variable motor, the sixth two-point control type bidirectional variable motor The first oil port, the first oil port of the seventh two-point control type bidirectional variable motor, and the first oil port of the eighth two-point control type bidirectional variable motor are connected; the other end oil port of the second oil distribution valve block is respectively connected to the first oil port The second oil port of the first two-point control type bidirectional variable motor, the second oil port of the second two-point control type bidirectional variable motor, the second oil port of the third two-point control type bidirectional variable motor, the fourth two-point control type The second oil port of the two-way variable motor, the fifth oil port of the two-point control type bi-directional variable motor, the sixth two-point control type bi-directional variable motor’s second oil port, the seventh two-point control type bi-directional variable motor’s second oil port The second oil port is connected to the second oil port of the eighth two-point control type bidirectional variable motor;

The fifth motor is rigidly connected to the fifth proportional variable pump through a coupling, the oil inlet of the fifth proportional variable pump is connected to the oil tank, and the oil outlet of the fifth proportional variable pump is connected to the oil inlet of the fifth one-way valve. The oil outlet of the fifth check valve is connected with the oil inlet of the speed regulating valve, and the oil outlet of the speed regulating valve is respectively connected with the control oil port of the first proportional variable pump, the control oil port of the second proportional variable pump, and the power limit The first oil port of the valve is connected with the oil inlet port of the proportional relief valve, the third oil port of the power limiting valve is connected with the fuel tank, and the oil outlet of the proportional relief valve is connected with the fuel tank.

The utility model adopts a large-displacement main drive proportional variable pump group and a small displacement auxiliary drive proportional variable pump group to drive the movement of the shield cutter head. When the cutter head is working, the two proportional variable pumps of the large-displacement main drive proportional variable pump set work at the same time, and the two proportional variable pumps of the small displacement auxiliary drive proportional variable pump set are incorporated into the device when the main drive power is insufficient to improve Load ratio and power source efficiency of individual hydraulic pumps. Through the electronic control system, the displacement of the proportional variable pump is adjusted to realize the adjustment of the speed of the cutter head.

The utility model is driven by a combination of a large displacement proportional variable pump group and a small displacement proportional variable pump group. The control method is an electronically controlled proportional variable. The installed power is moderate. The high efficiency can improve the efficiency of the power source and has the effect of saving energy. Since the proportional variable pump adopts electronically controlled variable displacement speed regulation and the two-point control type bidirectional variable variable motor, the speed of the shield cutter head can be adjusted within a wide range to meet the requirements of working conditions.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

As shown in Figure 1, the first motor 1.1 in the shield cutter head hydraulic system driven by multi-pump combination is rigidly connected with the first proportional variable pump 2.1 through a coupling; the oil inlet of the first proportional variable pump 2.1 is connected through a pipeline 15.1 communicates with the oil tank 14; the oil outlet of the first proportional variable pump 2.1 communicates with the oil inlet of the first one-way valve 3.1 through the pipeline 16.1; the oil outlet of the first one-way valve 3.1 passes through the pipelines 17.1, 18.1, 19, 20.1 communicates with the first oil port of the fifth two-way cartridge valve 6.5; the oil outlet of the first one-way valve 3.1 communicates with the oil inlet of the sixth one-way valve 3.6 through pipelines 17.1, 18.1, 19, and 20.2; The oil outlet of a one-way valve 3.1 is communicated with the first oil port of the second two-way cartridge valve 6.2 through pipelines 17.1, 18.1, 19, 20.3; the oil outlet of the first one-way valve 3.1 is connected through pipelines 17.1, 18.1, 19, 20.4 communicate with the first oil port of the third two-way cartridge valve 6.3; the oil outlet of the first one-way valve 3.1 is connected with the first oil port of the three-position four-way reversing valve 7 through pipelines 17.1, 18.1, 19 Connected; the second motor 1.2 is rigidly connected to the second proportional variable pump 2.2 through a coupling; the oil inlet of the second proportional variable pump 2.2 is connected to the oil tank 14 through the pipeline 15.2; the oil outlet of the second proportional variable pump 2.2 is connected through the pipeline 16.2 communicates with the oil inlet of the second one-way valve 3.2; the oil outlet of the second one-way valve 3.2 communicates with the first oil port of the fifth two-way cartridge valve 6.5 through pipelines 17.2, 18.1, 19, 20.1; The oil outlet of the second one-way valve 3.2 is communicated with the oil inlet of the sixth one-way valve 3.6 through pipelines 17.2, 18.1, 19, 20.2; the oil outlet of the second one-way valve 3.2 is through pipelines 17.2, 18.1, 19, 20.3 It communicates with the first oil port of the second two-way cartridge valve 6.2; the oil outlet of the second one-way valve 3.2 communicates with the first oil port of the third two-way cartridge valve 6.3 through pipelines 17.2, 18.1, 19, 20.4 ; The oil outlet of the second one-way valve 3.2 communicates with the first oil port of the three-position four-way reversing valve 7 through pipelines 17.2, 18.1, 19; the third motor 1.3 is rigid with the third proportional variable pump 2.3 through a coupling Connection; the oil inlet of the third proportional variable pump 2.3 communicates with the oil tank 14 through the pipeline 15.3; the oil outlet of the third proportional variable pump 2.3 communicates with the oil inlet of the third one-way valve 3.3 through the pipeline 16.3; the third one-way The oil outlet of valve 3.3 communicates with the first oil port of the fifth two-way cartridge valve 6.5 through pipelines 17.3, 18.2, 19, 20.1; the oil outlet of the third one-way valve 3.3 passes through pipelines 17.3, 18.2, 19, 20.2 It communicates with the oil inlet of the sixth one-way valve 3.6; the oil outlet of the third one-way valve 3.3 communicates with the first oil port of the second two-way cartridge valve 6.2 through pipelines 17.3, 18.2, 19, 20.3; the third The oil outlet of the one-way valve 3.3 communicates with the first oil port of the third two-way cartridge valve 6.3 through pipelines 17.3, 18.2, 19, 20.4; the third one-way valve The oil outlet of 3.3 communicates with the first oil port of the three-position four-way reversing valve 7 through pipelines 17.3, 18.2, 19; the fourth motor 1.4 is rigidly connected with the fourth proportional variable pump 2.4 through a coupling; the fourth proportional variable The oil inlet of the pump 2.4 is communicated with the oil tank 14 through the pipeline 15.4; the oil outlet of the fourth proportional variable pump 2.4 is communicated with the oil inlet of the fourth one-way valve 3.4 through the pipeline 16.4; the oil outlet of the fourth one-way valve 3.4 Connect with the first oil port of the fifth two-way cartridge valve 6.5 through pipelines 17.4, 18.2, 19, 20.1; the oil outlet of the fourth one-way valve 3.4 connects with the sixth one-way valve through pipelines 17.4, 18.2, 19, 20.2 The oil inlet of 3.6 is connected; the oil outlet of the fourth one-way valve 3.4 is connected with the first oil port of the second two-way cartridge valve 6.2 through pipelines 17.4, 18.2, 19, 20.3; the outlet of the fourth one-way valve 3.4 The oil port communicates with the first oil port of the third two-way cartridge valve 6.3 through pipelines 17.4, 18.2, 19 and 20.4; the oil outlet of the fourth one-way valve 3.4 communicates with the three-position four-way switching It communicates with the first oil port of the valve 7; the second oil port of the fifth two-way cartridge valve 6.5 communicates with the oil tank 14 through the pipeline 39.3, and the third oil port of the fifth two-way cartridge valve 6.5 communicates with the second oil port through the pipeline 21 The first oil port of the one-position three-way reversing valve 5 is connected; the second oil port of the two-position three-way reversing valve 5 is connected with the oil inlet of the first pilot relief valve 4.1 through the pipeline 22.1, and the first pilot relief valve The oil outlet of the valve 4.1 communicates with the oil tank 14 through the pipeline 39.1; the third oil port of the two-position three-way reversing valve 5 communicates with the oil inlet of the second pilot relief valve 4.2 through the pipeline 22.2, and the second pilot relief valve The oil outlet of the valve 4.2 communicates with the oil tank 14 through the pipeline 39.2; the oil outlet of the sixth check valve 3.6 communicates with the second oil port of the power limiting valve 13 through the pipeline 38; the first two-way cartridge valve 6.1 first The oil port communicates with the second oil port of the second two-way cartridge valve 6.2 through the pipeline 23.1; the second oil port of the first two-way cartridge valve 6.1 communicates with the oil tank 14 through the pipeline 39.6; the first two-way cartridge valve 6.1 The third oil port of the second two-way cartridge valve 6.2 is connected with the third oil port of the three-position four-way reversing valve 7 through the pipeline 24.1; the second oil port of the second two-way cartridge valve 6.2 is connected with the third oil port of the second two-way cartridge valve One oil distribution valve block 8.1 is connected to one end of the oil port; the third oil port of the second two-way cartridge valve 6.2 is connected to the second oil port of the three-position four-way reversing valve 7 through the pipeline 24.2; the third two-way cartridge valve The second oil port of 6.3 communicates with the oil port of the second oil distribution valve block 8.2 through the pipeline 25.2, 27.1, 27.2, 27.3, 27.4; the third oil port of the third two-way cartridge valve 6.3 communicates with the three-position four through the pipeline 24.3 The third oil port of the reversing valve 7 is connected; the first oil port of the fourth two-way cartridge valve 6.4 is connected with the second oil port of the third two-way cartridge valve 6.3 through the pipeline 23.2; The second oil port of the valve 6.4 communicates with the oil tank 14 through the pipeline 39.7; the fourth two-way cartridge valve 6. The third oil port of 4 communicates with the second oil port of the three-position four-way reversing valve 7 through the pipeline 24.4; the fourth oil port of the three-position four-way reversing valve 7 communicates with the oil tank 14 through the pipeline 39.8; the first oil distribution The oil port at the other end of the valve block 8.1 communicates with the first oil port of the first two-point control type two-way variable motor 9.1 through the pipelines 28.1, 28.2, 28.3, 28.4, the ring-type diverting and collecting pipeline 30, and the pipeline 32.1; The oil port at the other end of the oil distribution valve block 8.1 communicates with the first oil port of the second two-point control type bidirectional variable motor 9.2 through the pipelines 28.1, 28.2, 28.3, 28.4, the ring-shaped flow diversion and collection pipeline 30, and the pipeline 32.2; The oil port at the other end of the first oil distribution valve block 8.1 passes through the pipelines 28.1, 28.2, 28.3, 28.4, the annular diversion and collection pipeline 30, the pipeline 32.3 and the first oil port of the third two-point control type bidirectional variable motor 9.3 Connected; the other end oil port of the first oil distribution valve block 8.1 passes through pipelines 28.1, 28.2, 28.3, 28.4, ring-shaped diversion and collection pipeline 30, pipeline 32.4 and the first two-point control type two-way variable motor 9.4. The oil port is connected; the oil port at the other end of the first oil distribution valve block 8.1 passes through pipelines 28.1, 28.2, 28.3, 28.4, ring-shaped diversion and collection pipeline 30, pipeline 32.5 and the fifth two-point control type bidirectional variable motor 9.5 The first oil port is connected; the other end oil port of the first oil distribution valve block 8.1 is connected to the sixth two-point control bidirectional variable motor through pipelines 28.1, 28.2, 28.3, 28.4, annular diversion and collection pipeline 30, pipeline 32.6 The first oil port of 9.6 is connected; the oil port at the other end of the first oil distribution valve block 8.1 passes through pipelines 28.1, 28.2, 28.3, 28.4, ring-type diversion and collection pipeline 30, pipeline 32.7 and the seventh two-point control type two-way The first oil port of the variable motor 9.7 is connected; the other end oil port of the first oil distribution valve block 8.1 is controlled by pipelines 28.1, 28.2, 28.3, 28.4, ring-shaped diversion and collection pipeline 30, pipeline 32.8 and the eighth two-point control The first oil port of the type two-way variable motor 9.8 is connected; the other end oil port of the second oil distribution valve block 8.2 is connected to the first two oil ports through the pipelines 29.1, 29.2, 29.3, 29.4, the ring-shaped diversion and collection pipeline 31, and the pipeline 33.1. The second oil port of point control type two-way variable motor 9.1 is connected; The second oil port of the two-point control type bidirectional variable motor 9.2 is connected; the other end oil port of the second oil distribution valve block 8.2 passes through pipelines 29.1, 29.2, 29.3, 29.4, ring-type diverting and collecting pipeline 31, and pipeline 33.3 It is communicated with the second oil port of the third two-point control type bidirectional variable motor 9.3; the other end oil port of the second oil distribution valve block 8.2 passes through pipelines 29.1, 29.2, 29.3, 29.4, ring-type diverting and collecting pipeline 31, pipe Lu 33.4 and the fourth two-point control The second oil port of the type two-way variable motor 9.4 is connected; the other end oil port of the second oil distribution valve block 8.2 passes through the pipeline 29.1, 29.2, 29.3, 29.4, the ring-shaped diversion and collection pipeline 31, the pipeline 33.5 and the fifth two The second oil port of point control type bidirectional variable motor 9.5 is connected; The second oil port of the six two-point control type bidirectional variable motor 9.6 is connected; the other end oil port of the second oil distribution valve block 8.2 passes through pipelines 29.1, 29.2, 29.3, 29.4, ring-shaped diversion and collection pipeline 31, and pipeline 33.7 It is communicated with the second oil port of the seventh two-point control type bidirectional variable motor 9.7; the other end oil port of the second oil distribution valve block 8.2 passes through pipelines 29.1, 29.2, 29.3, 29.4, ring-type diverting and collecting pipeline 31, pipe Road 33.8 communicates with the second oil port of the eighth two-point control type bidirectional variable motor 9.8; the fifth motor 1.5 is rigidly connected with the fifth proportional variable pump 2.5 through a coupling; the oil inlet of the fifth proportional variable pump 2.5 is connected through a pipeline 15.5 communicates with the oil tank 14; the oil outlet of the fifth proportional variable pump 2.5 communicates with the oil inlet of the fifth one-way valve 3.5 through the pipeline 16.5; the oil outlet of the fifth one-way valve 3.5 communicates with the speed regulating valve 11 through the pipeline 35 The oil inlet of the speed regulating valve 11 is connected with the control oil port of the second proportional variable pump 2.2 through the pipeline 36, 37.1; the oil outlet of the speed regulating valve 11 is connected with the first proportional variable through the pipeline 36, 37.2 The control oil port of the pump 2.1 is connected; the oil outlet of the speed regulating valve 11 is connected with the first oil port of the power limiting valve 13 through the pipeline 36, 37.3; the oil outlet of the speed regulating valve 11 is connected with the proportional overflow through the pipeline 36, 37.4 The oil inlet of the valve 12 is communicated; the third oil port of the power limiting valve 13 is communicated with the fuel tank 14 through the pipeline 39.4; the oil outlet of the proportional relief valve 12 is communicated with the fuel tank 14 through the pipeline 39.5.

The working principle of the shield cutter head hydraulic device is as follows:

The first motor 1.1 and the second motor 1.2 are powered to start, respectively drive the first proportional variable pump 2.1 and the second proportional variable pump 2.2 to rotate, the first proportional variable pump 2.1 and the second proportional variable pump 2.2 are the main drive proportional variable pumps Group. The main drive proportional variable pump set sucks oil from the oil tank 14 through pipelines 15.1 and 15.2, and the pressure oil pumped out by the main drive proportional variable pump set passes through pipeline 16.1, first check valve 3.1, pipeline 17.1 and pipeline 16.2, second single Send to valve 3.2, pipeline 17.2 to pipeline 18.1, 19, 20.1, 20.2, 20.3, 20.4.

When the left electromagnet of the three-position four-way reversing valve 7 is energized, the high-pressure oil in the pipeline 19 acts on the third oil of the second two-way cartridge valve 6.2 through the three-position four-way reversing valve 7 and the pipeline 24.2. The high-pressure oil in the working chamber where the port is located and the pipeline 19 passes through the three-position four-way reversing valve 7 and the pipeline 24.4 acts on the working chamber where the third oil port of the fourth two-way cartridge valve 6.4 is located. The two-way cartridge valve 6.2 and the fourth two-way cartridge valve 6.4 are in a closed state. The working chamber where the third oil port of the first two-way cartridge valve 6.1 is located communicates with the fuel tank through the pipeline 24.1, the three-position four-way reversing valve 7, and the working chamber where the third oil port of the third two-way cartridge valve 6.3 is located The cavity communicates with the fuel tank through the pipeline 24.3, the three-position four-way reversing valve 7, and the first two-way cartridge valve 6.1 and the third two-way cartridge valve 6.3 are in an open state. The high-pressure oil in the pipeline 19 is sent to the oil distribution valve block 8.2 through the third two-way cartridge valve 6.3, the pipelines 23.2, 25.2, 27.1, 27.2, 27.3, and 27.4, and the pressure oil sent by the oil distribution valve block 8.2 passes through the pipeline 29.1 , 29.2, 29.3, and 29.4 are sent to the ring-type diverting and collecting pipeline 31, and the pressure oil sent by the ring-type dividing and collecting pipeline 31 enters the first two-point control type bidirectional variable motor 9.1 through the pipeline 33.1, and enters the second through the pipeline 33.2. Two-point control type two-way variable motor 9.2, enter the third two-point control type two-way variable motor 9.3 through pipeline 33.3, enter the fourth two-point control type two-way variable motor 9.4 through pipeline 33.4, enter the fifth two-point control type two-way variable motor through pipeline 33.5 The variable motor 9.5 enters the sixth two-point control type bidirectional variable motor 9.6 through the pipeline 33.6, enters the seventh two-point control type bidirectional variable motor 9.7 through the pipeline 33.7, enters the eighth two-point control type bidirectional variable motor 9.8 through the pipeline 33.8. The first two-point control type two-way variable motor 9.1 returns the oil to the oil return port and sends it to the ring-shaped diversion and collection line 30 through the pipeline 32.1, and the second two-point control type two-way variable motor 9.2 The oil return port returns the oil to the pipeline 32.2 To the ring-type diversion and collection pipeline 30, the third two-point control type bidirectional variable motor 9.3 The oil return port returns the oil through the pipeline 32.3 to the ring-type diversion and collection pipeline 30, the fourth two-point control type bidirectional variable motor 9.4 The oil returned from the oil return port is sent to the annular diversion and collection pipeline 30 through the pipeline 32.4, and the fifth two-point control type bidirectional variable motor 9.5 The oil returned from the oil return port is sent to the annular diversion and collection pipeline 30 through the pipeline 32.5. The sixth two-point control type two-way variable motor 9.6 returns the oil to the oil return port and sends it to the ring-shaped diversion and collection pipeline 30 through the pipeline 32.6. The seventh two-point control type bidirectional variable motor 9.7 returns the oil to the oil return port and sends it to the pipeline 32.7 To the annular diversion and collection pipeline 30, the eighth two-point control type bidirectional variable motor 9.8 oil return port returns the oil to the annular diversion and collection pipeline 30 through the pipeline 32.8, and the pressure in the annular diversion and collection pipeline 30 The oil is sent to the oil distribution valve block 8.1 through pipelines 28.1, 28.2, 28.3, 28.4, to the first two-way cartridge valve 6.1 through pipelines 26.1, 26.2, 26.3, 26.4, 25.1, and 23.1, and to the oil tank 14 through pipeline 39.6 to complete The oil is returned, so that the two-point control type bidirectional variable motors 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8 rotate under the pressure difference at both ends to drive the cutter head to rotate.

When the right electromagnet of the three-position four-way reversing valve 7 is energized, the situation is similar to the above. The valve 6.1 and the third two-way cartridge valve 6.3 are in the closed state, and the oil inlet and oil return of the two-point control type bidirectional variable motor is opposite to the above, and the reverse rotation of the cutter head is realized.

The fifth motor 1.5, the fifth proportional variable pump 2.5, the fifth one-way valve 3.5, the speed regulating valve 11, the proportional overflow valve 12, the power limiting valve 13, and the sixth one-way valve 3.6 form the first proportional variable pump 2.1 and the first proportional variable pump 2.1. Two proportional variable pumps 2.2 displacement control oil return circuit. The fifth motor 1.5 is powered and started to drive the fifth proportional variable pump 2.5. The fifth proportional variable pump 2.5 absorbs oil from the oil tank 14 through the pipeline 15.5, and the pressure oil pumped out by the fifth proportional variable pump 2.5 is sent to the speed regulating valve 11 through the pipeline 16.5, the fifth one-way valve 3.5, and the pipeline 35. Valve 11 is sent to the control oil port of the second proportional variable pump 2.2 through pipelines 36 and 37.1 after flow adjustment, to the control oil port of the first proportional variable pump 2.1 through pipelines 36 and 37.2, and to the power output port through pipelines 36 and 37.3. The first oil port of the restriction valve 13 is sent to the oil inlet port of the proportional relief valve 12 through pipelines 36 and 37.4. The pressure oil in the pipeline 19 is sent to the second oil port of the power limiting valve 13 through the sixth one-way valve 3.6, and the pressure in the pipeline 19 is the system pressure. When the system pressure does not reach the initial setting value of the power limiting valve 13, the pressure of the control port of the first proportional variable pump 2.1 and the second proportional variable pump 2.2 is determined by the proportional relief valve 12 and is proportional to its adjustment signal . Since the control oil port pressure of the first proportional variable pump 2.1 and the second proportional variable pump 2.2 is proportional to the displacement of the first proportional variable pump 2.1 and the second proportional variable pump 2.2, the first ratio is realized by adjusting the proportional relief valve 12 The displacement of the variable pump 2.1 and the second proportional variable pump 2.2 are continuously adjustable, thereby realizing the continuous adjustment of the cutter head speed; when the system pressure exceeds the initial setting value of the power limiting valve 13, the power limiting valve 13 works and begins to overflow. As a result, the pressure in the pipeline 36 decreases, so that the control port pressure of the first proportional variable pump 2.1 and the second proportional variable pump 2.2 decreases, thereby reducing the displacement of the first proportional variable pump 2.1 and the second proportional variable pump 2.2, The speed of the cutter head is reduced, keeping the output power of the first proportional variable pump 2.1 and the second proportional variable pump 2.2 constant, and preventing the power overload of the first proportional variable pump 2.1 and the second proportional variable pump 2.2.

When the output flow of the first proportional variable pump 2.1 and the second proportional variable pump 2.2 is sufficient to drive the cutter head to reach the set speed, only the first proportional variable pump 2.1 and the second proportional variable pump 2.2 are turned on; when the first proportional variable pump 2.1 And when the output flow of the second proportional variable pump 2.2 is not enough to drive the cutterhead to reach the set speed, the motor 1.3 and the motor 1.4 are powered on to drive the small displacement third proportional variable pump 2.3 and the fourth proportional variable pump 2.4 to rotate respectively , the third proportional variable pump 2.3 and the fourth proportional variable pump 2.4 are auxiliary drive proportional variable pump sets, and the analysis of the hydraulic oil circuit is similar to the above situation. Auxiliary drive proportional variable pumps have their own constant power control mechanism and are controlled by a special electronic control system. The large-displacement main drive proportional variable pump set and the small-displacement auxiliary drive proportional variable pump set are combined to provide the flow required by the cutterhead speed.

Two-point control bidirectional variable motors 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8 can set the motor displacement at the minimum displacement or maximum displacement through a special control device, so as to achieve a given Under the flow rate, the cutter head can be switched between high and low speed.

The fifth two-way cartridge valve 6.5, the two-position three-way reversing valve 5 and the pilot relief valves 4.1 and 4.2 form a pressure limiting protection circuit. The system pressure oil in the pipeline 19 communicates with the first oil port of the fifth two-way cartridge valve 6.5 through the pipeline 20.1, and the system pressure oil passes through the damping port in the fifth two-way cartridge valve 6.5 and then passes through the pipeline 21 and the two-position three It is connected to the first oil port of the reversing valve 5. When the cutter head is working under normal working conditions, the solenoid of the two-position three-way reversing valve 5 is powered off, and the pilot overflow valve 4.1 is connected to the circuit. If the system pressure exceeds the pressure setting value of the pilot overflow valve 4.1, the pilot overflow valve The flow valve 4.1 starts to overflow, so that the fifth two-way cartridge valve 6.5 is in the open state, and the system pressure oil begins to overflow through the second oil port of the fifth two-way cartridge valve 6.5, so as to limit the pressure under normal working conditions. Pressure protection; when the cutter head is working in the escape mode, the electromagnet of the two-position three-way reversing valve 5 is energized, and the pilot relief valve 4.2 is connected to the circuit. The principle is similar to the above, and it acts as a pressure limiting protection for the escape condition.

Claims (1)

1, a kind of shield cutter hydraulic means, comprise fuel tank, first motor, second motor, the 3rd motor, the 4th motor, the 5th motor, first proportional variable pump, second proportional variable pump, the 3rd proportional variable pump, the 4th proportional variable pump, the 5th proportional variable pump, first two-way plug-in valve, second two-way plug-in valve, the 3rd two-way plug-in valve, the 4th two-way plug-in valve, the 5th two-way plug-in valve, first precursor overflow valve, second precursor overflow valve, first liang of point control type double-action variable displacement motor, second liang of point control type double-action variable displacement motor, the 3rd liang of point control type double-action variable displacement motor, the 4th liang of point control type double-action variable displacement motor, the 5th liang of point control type double-action variable displacement motor, the 6th liang of point control type double-action variable displacement motor, the 7th liang of point control type double-action variable displacement motor, the 8th liang of point control type double-action variable displacement motor, two position three way directional control valve, three position four-way directional control valve, the Power Limitation valve, proportional pressure control valve, flow speed control valve is characterized in that:

First motor is rigidly connected through the shaft coupling and first proportional variable pump, the oil-in of first proportional variable pump is communicated with fuel tank, the oil-out of first proportional variable pump is communicated with the oil-in of first one way valve, and the oil-out of first one way valve is communicated with first hydraulic fluid port of the 5th two-way plug-in valve, the oil-in of the 6th one way valve, first hydraulic fluid port of second two-way plug-in valve, first hydraulic fluid port of the 3rd two-way plug-in valve and first hydraulic fluid port of three position four-way directional control valve respectively;

Second motor is rigidly connected through the shaft coupling and second proportional variable pump, the oil-in of second proportional variable pump is communicated with fuel tank, the oil-out of second proportional variable pump is communicated with the oil-in of second one way valve, and the oil-out of second one way valve is communicated with first hydraulic fluid port of the 5th two-way plug-in valve, the oil-in of the 6th one way valve, first hydraulic fluid port of second two-way plug-in valve, first hydraulic fluid port of the 3rd two-way plug-in valve and first hydraulic fluid port of three position four-way directional control valve respectively;

The 3rd motor is rigidly connected through shaft coupling and the 3rd proportional variable pump, the oil-in of the 3rd proportional variable pump is communicated with fuel tank, the oil-out of the 3rd proportional variable pump is communicated with the oil-in of the 3rd one way valve, and the oil-out of the 3rd one way valve is communicated with first hydraulic fluid port of the 5th two-way plug-in valve, the oil-in of the 6th one way valve, first hydraulic fluid port of second two-way plug-in valve, first hydraulic fluid port of the 3rd two-way plug-in valve and first hydraulic fluid port of three position four-way directional control valve respectively;

The 4th motor is rigidly connected through shaft coupling and the 4th proportional variable pump, the oil-in of the 4th proportional variable pump is communicated with fuel tank, the oil-out of the 4th proportional variable pump is communicated with the oil-in of the 4th one way valve, and the oil-out of the 4th one way valve is communicated with first hydraulic fluid port of the 5th two-way plug-in valve, the oil-in of the 6th one way valve, first hydraulic fluid port of second two-way plug-in valve, first hydraulic fluid port of the 3rd two-way plug-in valve and first hydraulic fluid port of three position four-way directional control valve respectively;

Second hydraulic fluid port of the 5th two-way plug-in valve is communicated with fuel tank, and the 3rd hydraulic fluid port of the 5th two-way plug-in valve is communicated with first hydraulic fluid port of two position three way directional control valve; Second hydraulic fluid port of two position three way directional control valve is communicated with the oil-in of first precursor overflow valve, and the oil-out of first precursor overflow valve is communicated with fuel tank; The 3rd hydraulic fluid port of two position three way directional control valve is communicated with the oil-in of second precursor overflow valve, and the oil-out of second precursor overflow valve is communicated with fuel tank; The oil-out of the 6th one way valve is communicated with second hydraulic fluid port of Power Limitation valve; First hydraulic fluid port of first two-way plug-in valve is communicated with second hydraulic fluid port of second two-way plug-in valve; Second hydraulic fluid port of first two-way plug-in valve is communicated with fuel tank; The 3rd hydraulic fluid port of first two-way plug-in valve is communicated with the 3rd hydraulic fluid port of three position four-way directional control valve; Second hydraulic fluid port of second two-way plug-in valve is communicated with the first separating valve piece, one end hydraulic fluid port; The 3rd hydraulic fluid port of second two-way plug-in valve is communicated with second hydraulic fluid port of three position four-way directional control valve; Second hydraulic fluid port of the 3rd two-way plug-in valve is communicated with the second separating valve piece, one end hydraulic fluid port; The 3rd hydraulic fluid port of the 3rd two-way plug-in valve is communicated with the 3rd hydraulic fluid port of three position four-way directional control valve; First hydraulic fluid port of the 4th two-way plug-in valve is communicated with second hydraulic fluid port of the 3rd two-way plug-in valve; Second hydraulic fluid port of the 4th two-way plug-in valve is communicated with fuel tank; The 3rd hydraulic fluid port of the 4th two-way plug-in valve is communicated with second hydraulic fluid port of three position four-way directional control valve; The 4th hydraulic fluid port of three position four-way directional control valve is communicated with fuel tank; The other end hydraulic fluid port of the first separating valve piece respectively with first hydraulic fluid port of first liang of point control type double-action variable displacement motor, first hydraulic fluid port of second liang of point control type double-action variable displacement motor, first hydraulic fluid port of the 3rd liang of point control type double-action variable displacement motor, first hydraulic fluid port of the 4th liang of point control type double-action variable displacement motor, first hydraulic fluid port of the 5th liang of point control type double-action variable displacement motor, first hydraulic fluid port of the 6th liang of point control type double-action variable displacement motor, first hydraulic fluid port of the 7th liang of point control type double-action variable displacement motor, first hydraulic fluid port of the 8th liang of point control type double-action variable displacement motor is communicated with; The other end hydraulic fluid port of the second separating valve piece respectively with second hydraulic fluid port of first liang of point control type double-action variable displacement motor, second hydraulic fluid port of second liang of point control type double-action variable displacement motor, second hydraulic fluid port of the 3rd liang of point control type double-action variable displacement motor, second hydraulic fluid port of the 4th liang of point control type double-action variable displacement motor, second hydraulic fluid port of the 5th liang of point control type double-action variable displacement motor, second hydraulic fluid port of the 6th liang of point control type double-action variable displacement motor, second hydraulic fluid port of the 7th liang of point control type double-action variable displacement motor, second hydraulic fluid port of the 8th liang of point control type double-action variable displacement motor is communicated with;

The 5th motor is rigidly connected through shaft coupling and the 5th proportional variable pump, the oil-in of the 5th proportional variable pump is communicated with fuel tank, the oil-out of the 5th proportional variable pump is communicated with the oil-in of the 5th one way valve, the oil-out of the 5th one way valve is communicated with the oil-in of flow speed control valve, the oil-out of flow speed control valve is communicated with the control port of first proportional variable pump, the control port of second proportional variable pump, first hydraulic fluid port of Power Limitation valve, the oil-in of proportional pressure control valve respectively, the 3rd hydraulic fluid port of Power Limitation valve is communicated with fuel tank, and the oil-out of proportional pressure control valve is communicated with fuel tank.

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