TWI498495B - Fixed pressure providing device for hydrostatic bearing - Google Patents

Description

Static pressure bearing constant voltage regulator

The invention relates to a voltage stabilizing device, in particular to a constant voltage stabilizing device applied to a hydrostatic bearing.

Existing precision machining machines usually provide hydrostatic bearings on their machining spindles, rotary tables or sliding structures instead of general bearings to reduce friction and reduce heat generation, and to provide machining accuracy. Taking the machining spindle as an example, the pumping is mainly used to pump hydraulic oil to the oil chamber of the shaft hole of the screw shaft, so that an oil film is formed between the shaft core and the hole wall of the shaft hole, so that the shaft center is on the oil film. Rotating action under the coating lubrication, thereby achieving the advantages of providing machining accuracy, suppressing vibration, and reducing wear.

However, although the conventional hydrostatic bearing has the above advantages, there are still many innate defects to be overcome, for example: " "

1. The oil pressure is high, which is easy to cause the operating oil to leak too fast, pollute the working machine, and even stick dust, which affects the life of the machine.

2. After the oil leakage, the high-pressure pump must be started to deliver the oil again. As a result, the pump is switched on and off at high frequency, which is not only easy to malfunction, but also consumes electricity and does not meet environmental protection requirements.

3. When the pump is started, it will generate a pulse phenomenon in the oil circuit. When the pulse is transmitted to the hydrostatic bearing, the machining accuracy will be affected.

The reason is that the inventor of the present invention is concerned with the lack of continuous operation of the above-mentioned hydrostatic bearing in the case of constant voltage regulation, and actively and continuously researches and improves in the spirit of perseverance and excellence, and after long-term efforts and experiments, finally The present invention was developed and designed.

The main object of the present invention is to solve the above problems and provide a static pressure bearing constant voltage regulator device, so that the static pressure bearing can continuously provide lubrication under the condition of voltage regulation, avoiding pulses, and thereby providing processing precision.

In order to achieve the above object, the present invention mainly includes an oil supply pump; a voltage regulator connected to the oil supply pump through a fuel supply line, the voltage regulator includes a cylinder body, and an extension into the cylinder block a piston rod, the first end of the piston rod is fixed with a piston, and the periphery of the piston is airtightly attached to the inner wall of the cylinder; the second end of the piston rod extends beyond the cylinder The utility model is further provided with a sensing block; the piston rod is provided with a baffle in the radial direction of the cylinder body, and an equal pressure spring is sleeved, and the two ends of the compression spring are respectively pressed against the baffle plate and the cylinder body by preloading. The inner wall forces the piston to push the hydraulic oil in the cylinder into the oil pipeline and delivers it to the hydrostatic bearing with equal thrust; the regulator further includes a first inductor and a second inductor, wherein The two inductors are respectively fixed on the machine platform with the hydrostatic bearing, and are respectively electrically connected to the oil supply pump, and the oil supply pump is controlled to be opened and closed by sensing the sensing block; and one or two The ends are respectively connected to the oil pipeline of the voltage regulator and the hydrostatic bearing.

According to the above structural combination, the present invention mainly utilizes the restoring force of the isostatic spring to supply oil. Therefore, the oil supply pressure is low, and the disadvantage that the operating oil is easily leaked by the high pressure can be surely improved; the oil supply pump of the present invention transmits the first The control of a sensor and the second sensor, timing start and quantitative oil supply, not only can extend the service life of the oil pump, but also save energy; and when the oil pump is started, the pressure spring can Absorbing the pulse from the oil pump to make the oil does not affect the machining accuracy, so that the processed workpiece can have a uniform processing quality.

The above and other objects and advantages of the present invention will be readily understood from

Of course, the invention may be varied on certain components, or in the arrangement of the components, but the selected embodiments are described in detail in the specification and their construction is shown in the drawings.

The invention relates to a static pressure bearing constant voltage regulator device, as shown in the first figure, which mainly comprises an oil supply pump supplement (10), a fuel supply pipeline (20) and the oil supply pump. The (10) connected voltage regulator (30) and one end are respectively connected to the oil supply line (40) of the voltage regulator (30) and the static pressure bearing (50).

The oil supply line (20) is provided with a check valve (21), so that the operating oil can only be transported in one direction to the regulator (30).

The regulator (30) comprises a cylinder (31), the inner wall of the cylinder (31) is provided with a partition (32), and the cylinder (31) is divided into a first chamber (311). And a second chamber (312), a partition (321) is formed in the center of the partition (32). a piston rod (33) extending through the second chamber (312) and extending through the through hole (321) into the first chamber (311), the first end of the piston rod (33) is fixed with a piston (331). The periphery of the piston (331) is in an airtight manner against the inner wall of the first chamber (311). The second end of the piston rod (33) extends beyond the cylinder (31) and is provided with a sensing block (332). The piston rod (33) is located at a position of the second chamber (312), and a baffle plate (333) is radially disposed, and an equal pressure spring (334) is sleeved, and the two ends of the pressure spring (334) are respectively Pressing against the inner wall of the baffle plate (333) and the cylinder block (31) in a preload manner, forcing the piston (331) to continuously push the working oil in the first chamber (311) into the oil pipeline with equal thrust. (40) and transported to the hydrostatic bearing (50) for lubrication. The voltage regulator (30) further includes a first inductor (34) and a second inductor (35), wherein the two inductors (34, 35) are respectively fixed to the hydrostatic bearing (50) The machine (not shown) is electrically connected to the oil supply pump (10) and the check valve (21). The first inductor (34) and the second inductor (35) may be limit switches, so that the sensing block (332) is in direct contact with the touch; or the reed switch may be used, and the sensing block (332) is changed into a magnet. The components that make up the same can also control the effect of the oil pump (10).

Referring to the second and third figures, when the first sensor (34) detects the sensing block (332), the oil supply pump (10) is driven and the check valve (21) is opened. The actuating oil is driven into the first chamber (311) through the oil supply line (20), and the baffle (333) is forced to compress the isostatic spring (334). When the second sensor (35) detects the sensing block (332), the oil supply operation of the oil supply pump (10) is stopped, and the check valve (21) is closed. At this time, by the restoring force of the isostatic spring (334), the piston (331) is used to transport the working oil in the first chamber (311) through the oil pipeline (40) to the hydrostatic bearing to achieve lubrication effect. At the same time, by the stable low-pressure operation design of the isostatic spring (334), the operating oil is different from the traditional high-pressure pumping operation, so that the use efficiency of the working oil is higher than that of the conventional high-pressure pump.

In summary, the present invention does have the following advantages:

1. The present invention mainly utilizes the restoring force of the isostatic spring (334) to supply oil. Therefore, the oil supply pressure is low, and the shortcoming of excessive leakage when the operating oil is high pressure can be surely improved.

2. The oil supply pump (10) of the present invention is controlled by the first inductor (34) and the second inductor (35) to periodically start and quantitatively supply oil, which not only extends the use of the oil supply pump (10). Life expectancy is more energy-saving.

3. When the oil supply pump (10) is started, the pressure spring (334) can absorb the pulse from the oil supply pump (10), which does not affect the machining accuracy, so that the workpieces processed can be uniform. Processing quality.

The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

From the above detailed description, those skilled in the art can understand that the present invention can achieve the foregoing objects, and no similar publications are found in similar processes or products, which have been in compliance with the provisions of the Patent Law, and have been patented according to law. Application.

10‧‧‧Supply pump

20‧‧‧ oil supply pipeline

21‧‧‧ check valve

30‧‧‧Regulator

31‧‧‧Cylinder

311‧‧‧First room

312‧‧‧Second room

32‧‧‧Baffle

321‧‧‧Perforation

33‧‧‧ piston rod

331‧‧‧Piston

332‧‧‧Sense block

333‧‧ ‧ baffle

334‧‧‧equal pressure spring

34‧‧‧First sensor

35‧‧‧Second sensor

40‧‧‧ Oil pipeline

50‧‧‧Static bearing

The first figure is a cross-sectional view of the present invention.

The second figure is a schematic diagram of the action of the oil supply pump of the present invention when it is started.

The third figure is a schematic diagram of the action of the oil supply pump of the present invention when it stops.

10‧‧‧Supply pump

20‧‧‧ oil supply pipeline

21‧‧‧ check valve

30‧‧‧Regulator

31‧‧‧Cylinder

311‧‧‧First room

312‧‧‧Second room

32‧‧‧Baffle

321‧‧‧Perforation

33‧‧‧ piston rod

331‧‧‧Piston

332‧‧‧Sense block

333‧‧ ‧ baffle

334‧‧‧equal pressure spring

34‧‧‧First sensor

35‧‧‧Second sensor

40‧‧‧ Oil pipeline

50‧‧‧Static bearing

Claims (8)

A static pressure bearing constant voltage regulator device mainly comprises: an oil supply pump; a voltage regulator connected to the oil supply pump through a fuel supply pipeline, the voltage regulator comprises a cylinder body, a a piston rod extending into the cylinder, the first end of the piston rod is fixed with a piston, and the periphery of the piston is airtightly attached to the inner wall of the cylinder; the second end of the piston rod is Extending out of the cylinder body and mounting a sensing block; the piston rod is provided with a baffle in the radial direction of the cylinder body, and is sleeved with an isostatic spring, and the two ends of the compression spring are respectively preloaded Abutting against the baffle and the inner wall of the cylinder, forcing the piston to continuously push the hydraulic oil in the cylinder into the oil pipeline and to the static pressure bearing with equal thrust; the regulator further includes a a first inductor and a second inductor, the two inductors are respectively fixed on the machine platform with hydrostatic bearings, and are respectively electrically connected to the oil supply pump, and the sensor block is controlled by sensing the sensing block. The oil supply pump is turned on and off; and the two ends are respectively connected to the oil supply of the regulator and the hydrostatic bearing Road. The static pressure bearing constant voltage regulator according to claim 1, wherein the inner wall of the cylinder is provided with a partition, and the cylinder is divided into a first chamber and a second chamber. A perforation is formed in the center of the partition. The static pressure bearing constant voltage regulator according to claim 2, wherein the first end of the piston rod penetrates the through hole, and the piston system is accommodated in the first chamber; and the baffle system It is accommodated in the second chamber. The static pressure bearing constant voltage regulator according to the first, second or third aspect of the invention, wherein the oil supply pipeline is provided with a one-way electrically connected to the first inductor and the second inductor. The valve allows the operating oil to be delivered to the regulator only in one direction. The static pressure bearing constant voltage regulator according to claim 1, 2 or 3, wherein the first inductor and the second inductor are respectively limit switches. The static pressure bearing constant voltage regulator according to claim 4, wherein the first inductor and the second inductor are respectively limit switches. The static pressure bearing constant voltage regulator according to claim 1, wherein the first inductor and the second inductor are respectively a reed switch, and the sensing block is made of a magnet. As a component. The static pressure bearing constant voltage regulator according to claim 4, wherein the first inductor and the second inductor are respectively a reed switch, and the sensing block is a member made of a magnet.