CN106402096A - Operating method of hydraulic heat-exchange system of hydraulic bypass provided with piston type pressure release valve - Google Patents

Abstract

The present invention relates to a working method of a hydraulic bypass hydraulic heat exchange system with a piston pressure relief valve. The hydraulic heat exchange system with a hydraulic bypass piston pressure relief valve includes a heating source of equipment connected in series with an oil circuit circulation, A radiator and a liquid storage tank. A cooling fan is arranged on one side of the radiator, and a piston pressure relief valve is arranged in parallel on the oil circuit at both ends of the radiator. When the radiator is blocked or the internal pressure of the radiator is too high, the main hydraulic circuit is not smooth, and the pressure at one end of the piston pressure relief valve is greater than the pressure at the other end, and the fluid pushes the diaphragm to move to the low-pressure side, thereby achieving the purpose of pressure relief until the diaphragm The pressure on both sides of the plate is equal, the piston returns to its original position, and the main hydraulic circuit returns unobstructed. The invention has the advantages of high reliability, not easy to damage, and stable operation of the system.

Description

Working method of hydraulic heat exchange system with hydraulic bypass of piston pressure relief valve

technical field

The invention relates to a working method of a hydraulic bypass hydraulic heat exchange system with a piston pressure relief valve.

Background technique

As we all know, the best oil temperature of the hydraulic system is between 35 and 55 degrees Celsius. Once the temperature rises above 60 degrees Celsius, the system of the hydraulic system will drop significantly, and equipment failures will continue to occur, resulting in a serious decline in the stability of the equipment. The proper functioning of the machine equipment cannot be guaranteed. Especially in the midsummer season, the oil temperature is too high, and even the machinery and equipment are often shut down.

Therefore, the stability of the hydraulic heat exchange system directly affects the working status of the machinery and equipment. When the liquid pressure in the traditional hydraulic heat exchange system is too high, it will directly lead to excessive pressure in the heat exchanger and cause damage to the radiator. A general radiator has a fixed ratio of capacity in the sump of the radiator, and there is a certain large resistance for the fluid to pass through the heat dissipation channel of the radiator. It has a small liquid storage capacity and no buffer. In the case of large temperature difference, low temperature environment, unbalanced flow, liquid with a certain viscosity, and fluid with impact force, the pressure inside the heat dissipation channel of the radiator will also increase. , especially in the case of impact force and relatively high viscosity fluid, due to the resistance of the fluid inside the channel, the fluid cannot quickly pass through the inside of the radiator channel, so that the pressure increases, exceeding the maximum operating pressure of the radiator, and the radiator is very Easily damaged and scrapped.

Contents of the invention

The purpose of the present invention is to overcome the above disadvantages and provide a working method of a hydraulic heat exchange system with a hydraulic bypass of a piston pressure relief valve that is highly reliable, not easily damaged, and ensures stable operation of the system.

The purpose of the present invention is achieved like this:

A working method of a hydraulic heat exchange system with a hydraulic bypass with a piston pressure relief valve, the hydraulic heat exchange system with a hydraulic bypass with a piston pressure relief valve includes a heat source, a radiator, and a storage device connected in series in an oil circuit cycle A liquid tank, a cooling fan is provided on one side of the radiator, and a piston type pressure relief valve is arranged in parallel on the oil circuit at both ends of the radiator, and the piston type pressure relief valve includes a housing, a piston and two springs, and the housing The body is horizontally arranged, and a horizontally penetrating shell fluid channel is formed in the shell. A fluid passage cavity is provided in the middle of the shell, and a fixed partition ring plate is arranged in the fluid passage cavity. The partition ring plate divides the fluid passage The chamber is separated to form two left and right fluid channel half chambers. The piston is arranged laterally in the middle of the fluid passage of the housing, and the two springs are arranged laterally, and the two springs are respectively located in the fluid passage of the housing outside the piston. The pistons are left and right A hollow structure with openings at both ends, the piston includes a piston housing, and a vertical partition is arranged in the middle of the piston housing, and the partition divides the interior of the piston into two left and right piston fluids that are respectively connected to the outside world. Channels, symmetrically arranged fluid holes are arranged on the piston housing on the left and right sides of the partition.

When the main hydraulic circuit is unobstructed, the pressure at the left and right ends of the piston pressure relief valve is equal, the piston is at the center of the housing, the position of the diaphragm of the piston corresponds to the position of the partition ring plate of the housing, and the piston does not move; the hydraulic oil through the radiator;

When the radiator is blocked or the internal pressure of the radiator is too high, the main hydraulic circuit is not smooth, and the pressure at one end of the piston relief valve is greater than the pressure at the other end, and the fluid pushes the diaphragm to move to the low-pressure side, so that the piston also moves to the low-pressure side. When the fluid hole on the high-pressure side of the diaphragm is located in a fluid channel half-cavity on the low-pressure side, the fluid with higher pressure flows out from the piston fluid channel on the high-pressure side through the fluid hole to a fluid channel half-cavity on the low-pressure side, and then Flow to the piston fluid channel on the low-pressure side, so as to achieve the purpose of pressure relief. At this time, the spring on the high-pressure side is in a stretched state, and the spring on the low-pressure side is in a compressed state, until the pressure on both sides of the diaphragm is equal, and the piston returns to its original position , the hydraulic main road returns unobstructed.

The left and right ends of the housing are provided with threaded ports.

The left and right outer ends of the fluid channel of the housing are provided with locking grooves, and a retaining spring is arranged in the retaining groove, and the two springs are respectively located in the fluid channel of the housing between the piston and the retaining spring.

The inner diameter of the dividing ring plate is consistent with the inner diameter of the housing fluid channel.

The outer diameter of the spring matches the inner diameter of the housing fluid passage.

The fluid hole is arranged annularly on the piston housing.

The fluid holes on each side of the partition are provided in multiple turns.

The transverse distance between the leftmost fluid hole and the rightmost fluid hole is not greater than the transverse distance of the half-cavity of the fluid channel.

Compared with prior art, the beneficial effect of the present invention is:

The invention has the advantages of high reliability, not easily damaged, and stable operation of the system.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a structural schematic diagram of a piston pressure relief valve.

Figure 3 is a side view of the piston relief valve.

Fig. 4 is a plan sectional view of the housing.

Fig. 5 is a perspective sectional view of the housing.

Fig. 6 is a plan sectional view of the piston.

Fig. 7 is a perspective cross-sectional view of the piston.

FIG. 8 is a schematic diagram of Embodiment 1.

FIG. 9 is a schematic diagram of Embodiment 2.

Fig. 10 is an external perspective view of the piston pressure relief valve.

in:

Equipment heat source 1

Tank 2

Radiator 5

Piston pressure relief valve 6, housing 601, housing fluid passage 601.1, fluid passage cavity 601.2, separation ring plate 601.3, threaded interface 601.4, card groove 601.5, piston 602, piston housing 602.1, partition 602.2, fluid hole 602.3 , Step 602.4, Piston Fluid Channel 602.5, Spring 603, Circlip 604

Cooling fan 9.

detailed description

Referring to Fig. 1 to Fig. 10, the present invention relates to a hydraulic bypass hydraulic heat exchange system with a piston pressure relief valve, which includes a heat source 1, a radiator 5 and a liquid storage tank 2 connected in series with the oil circuit circulation, One side of the radiator 5 is provided with a cooling fan 9 . Piston pressure relief valves 6 are arranged in parallel on the oil passages at both ends of the radiator 5 , and temperature sensors are arranged on the oil passages or the liquid storage tank 2 .

The piston pressure relief valve 6 includes a housing 601, a piston 602 and two springs 603. The housing 601 is arranged laterally, and a housing fluid channel 601.1 is formed in the housing 601. The housing The middle part of 601 is provided with a fluid passage cavity 601.2, the inner diameter of the fluid passage cavity 601.2 is larger than the inner diameter of the shell fluid passage 601.1, a fixed partition ring plate 601.3 is arranged in the fluid passage cavity 601.2, and the inner diameter of the partition ring plate 601.3 is separated from the casing fluid channel 601.1. The fluid channel 601.1 has the same inner diameter, and the partition ring plate 601.3 separates the fluid channel cavity 601.2 to form two left and right fluid channel half cavities. The left and right ends of the housing 601 are provided with threaded interfaces 601.4, the piston 602 is arranged laterally in the middle of the housing fluid passage 601.1, and the left and right outer ends of the housing fluid passage 601.1 are provided with locking grooves 601.5, A retaining spring 604 is arranged in the retaining groove 601.5, two springs 603 are arranged laterally, and the two springs 603 are respectively located in the casing fluid channel 601.1 between the piston 602 and the retaining spring 604, and the outer diameter of the spring 603 is the same as that of the casing. The inner diameter of the fluid channel 601.1 matches. The piston 602 is a hollow structure with openings at both left and right ends. The piston 602 includes a piston housing 602.1. A vertically arranged partition 602.2 is arranged in the middle of the piston housing 602.1. The partition 602.2 divides the interior of the piston 602 Separated into two left and right piston fluid passages 602.5 that communicate with the outside world respectively, symmetrically arranged fluid holes 602.3 are arranged on the piston housing 602.1 located on the left and right sides of the partition plate 602.2, and the fluid holes 602.3 are annularly arranged on the piston housing 602.1 The fluid holes 602.3 on each side of the partition 602.2 can be arranged in multiple circles, and the lateral distance between the leftmost circle of fluid holes 602.3 and the rightmost circle of fluid holes 602.3 is not greater than the transverse distance of the fluid channel half-cavity. The left and right ends of the piston 602 are provided with steps 602.4 that cooperate with the spring 603 .

A working method of a hydraulic heat exchange system with a hydraulic bypass of a piston relief valve:

When the main hydraulic circuit is unobstructed, the pressure at the left and right ends of the piston pressure relief valve is equal, the piston is at the center of the housing, the position of the diaphragm of the piston corresponds to the position of the separating ring plate of the housing, and the piston does not move;

Example 1. When the liquid flows from left to right and the main hydraulic circuit is blocked, the pressure at the left end of the piston relief valve is greater than the pressure at the right end, because the pressure in the fluid channel of the piston on the left side of the diaphragm is greater than that of the piston on the right side of the diaphragm The pressure in the fluid channel, the fluid pushes the diaphragm to move to the right, so that the piston also moves to the right. The piston fluid channel flows out through the fluid hole to a fluid channel half cavity on the right, and then flows into the right piston fluid channel, so as to achieve the purpose of pressure relief. At this time, the spring on the left is in a stretched state. The spring on the right is in a compressed state until the pressure on the left and right sides of the diaphragm is equal, the piston returns to its original position, and the main hydraulic circuit returns unobstructed.

Example 2. When the liquid flows from left to right and the main hydraulic circuit is blocked, the pressure at the right end of the piston relief valve is greater than the pressure at the left end, because the pressure in the fluid channel of the piston on the right side of the diaphragm is greater than that of the piston on the left side of the diaphragm The pressure in the fluid channel, the fluid pushes the diaphragm to move to the left, so that the piston also moves to the left. The piston fluid channel flows out through the fluid hole to a fluid channel half cavity on the left, and then flows into the left piston fluid channel, so as to achieve the purpose of pressure relief. At this time, the spring on the right is in a stretched state. The spring on the left is in a compressed state until the pressure on the left and right sides of the diaphragm is equal, the piston returns to its original position, and the main hydraulic circuit returns unobstructed.

Claims (9)

1. A working method of a hydraulic heat exchange system with a hydraulic bypass of a piston pressure relief valve, characterized in that the hydraulic heat exchange system of a hydraulic bypass with a piston pressure relief valve includes an equipment heat source connected in series with oil circulation , a radiator and a liquid storage tank, one side of the radiator is provided with a cooling fan, and a piston pressure relief valve is arranged in parallel on the oil circuit at both ends of the radiator, and the piston pressure relief valve includes a housing (601), a piston (602) and two springs (603), the casing (601) is arranged laterally, and a casing fluid passage (601.1) is formed in the casing (601), the casing (601) There is a fluid channel cavity (601.2) in the middle, and a fixed partition ring plate (601.3) is arranged in the fluid channel cavity (601.2). The partition ring plate (601.3) separates the fluid channel cavity (601.2) to form two left and right fluid channels Half cavity, the piston (602) is arranged laterally in the middle of the housing fluid channel (601.1), two springs (603) are arranged laterally, and the two springs (603) are respectively located in the housing fluid channel outside the piston (602) (601.1), the piston (602) is a hollow structure with open left and right ends, the piston (602) includes a piston housing (602.1), and the middle part of the piston housing (602.1) is provided with a vertically arranged The partition (602.2), the partition (602.2) divides the inside of the piston (602) into two left and right piston fluid passages (602.5) that communicate with the outside world respectively, and the piston housings ( 602.1) is provided with symmetrically arranged fluid holes (602.3); When the main hydraulic circuit is unobstructed, the pressure at the left and right ends of the piston pressure relief valve is equal, the piston is at the center of the housing, the position of the diaphragm of the piston corresponds to the position of the partition ring plate of the housing, and the piston does not move; the hydraulic oil through the radiator; When the radiator is blocked or the internal pressure of the radiator is too high, the main hydraulic circuit is not smooth, and the pressure at one end of the piston relief valve is greater than the pressure at the other end, and the fluid pushes the diaphragm to move to the low-pressure side, so that the piston also moves to the low-pressure side. When the fluid hole on the high-pressure side of the diaphragm is located in a fluid channel half-cavity on the low-pressure side, the fluid with higher pressure flows out from the piston fluid channel on the high-pressure side through the fluid hole to a fluid channel half-cavity on the low-pressure side, and then Flow to the piston fluid channel on the low-pressure side, so as to achieve the purpose of pressure relief. At this time, the spring on the high-pressure side is in a stretched state, and the spring on the low-pressure side is in a compressed state, until the pressure on both sides of the diaphragm is equal, and the piston returns to its original position , the hydraulic main road returns unobstructed. 2. The working method of a hydraulic heat exchange system with a hydraulic bypass of a piston pressure relief valve according to claim 1, characterized in that the left and right ends of the housing (601) are provided with threaded interfaces (601.4 ). 3. The working method of a hydraulic heat exchange system with a hydraulic bypass of a piston pressure relief valve according to claim 1, characterized in that the left and right outer ends of the fluid channel (601.1) of the housing are provided with There is a card slot (601.5), and a clip spring (604) is arranged in the clip slot (601.5), and two springs (603) are respectively located in the housing fluid passage (601.1) between the piston (602) and the clip ring (604). )Inside. 4. The working method of a hydraulic heat exchange system with a hydraulic bypass of a piston pressure relief valve according to claim 1, characterized in that the inner diameter of the separating ring plate (601.3) and the inner diameter of the shell fluid channel (601.1) Consistent inner diameter. 5. The working method of a hydraulic heat exchange system with a hydraulic bypass of a piston pressure relief valve according to claim 1, characterized in that the outer diameter of the spring (603) is the same as the inner diameter of the fluid channel (601.1) of the casing match. 6. The working method of a hydraulic heat exchange system with a hydraulic bypass of a piston pressure relief valve according to claim 1, characterized in that the fluid hole (602.3) is arranged annularly on the piston housing (602.1) . 7. The working method of a hydraulic heat exchange system with a hydraulic bypass of a piston pressure relief valve according to claim 1, characterized in that there are multiple fluid holes (602.3) on each side of the partition (602.2) lock up. 8. The working method of a hydraulic bypass hydraulic heat exchange system with a piston pressure relief valve according to claim 1, characterized in that the leftmost fluid hole (602.3) to the rightmost fluid hole (602.3) The lateral distance between them is not greater than the lateral distance of the fluid channel half cavity. 9. The working method of a hydraulic bypass hydraulic heat exchange system with a piston pressure relief valve according to claim 1, characterized in that the left and right ends of the piston (602) are provided with springs (603) Fitting steps (602.4).