China Standard Swl Series Helical Cast Iron Mechanical Manual Worm Gear Hydraulic Screw Jack supplier

Product Description

1.Convenient to adjust
2.Wide range of ratio
3.Easy to install
4.high torque
Application Industries:
Our SWL series screw jacks are widely used in the industries such as metallurgy,mining,hoisting and transportation, electrical
power,energy source,constrction and building material,light industry and traffice industry

Screw Jacks in construction

Often found in climbing mechanism of construction,the screw jacks use physical means to raise and lower loads, which typically range from 5 tons to 30 tons. A screw jack is a common type of mechanical jack, which works via a motor and gearbox by an operator. A screw uses the shape of its threads to raise or lower the load, or a traveling nut does the lifting while the screw turns in place. Mechanical jacks are self-locking(not for ball screw), which means that when power is removed from the jack, the screw stays in place until power resumes. This setup makes mechanical jacks safer than their hydraulic counterparts, because users don’t have to fear a loss of power. The main components of screw jacks are; trapezoidal lifting screw also known as lead screw, worm screw, worm gear and gear housing. A worm screw is rotated manually or by a motor. With the rotation of the worm gear, the lead screw in it moves upwards or downwards linearly. The feed rate of the screw depends on the turning speed, the number of teeth of the gears and the size of the screw pitch. In some models of jackscrews, The lifting screw does not move up and down. It only rotates around its axis. A lifting nut (also known as a travelling nut) moves along the lead screw. The lifting nut of the screw jack is made of bronze to decrease friction.

Product Parameters

MODEL

 

SWL2.5

SWL5

SWL10

SWL15

SWL20

SWL25

SWL35

Maximum lifting force (kN)

 

25

50

100

150

200

250

350

Screw thread size

 

Tr30*6

Tr40*7

Tr58*12

Tr58*12

Tr65*12

Tr90*16

Tr100*20

Maximum tension (kN)

 

25

50

99

166

250

350

Worm gear ratio (mm)

P

1/6

1/8

3/23

1/8

3/32

3/32

 

M

1/24

1/24

1/24

1/24

1/32

1/32

Worm non rotating stroke (mm)

P

1.0

0.875

1.565

1.56

1.5

1.875

M

0.250

0.292

0.5

0.5

0.5

0.625

Maximum elongation of screw rod under tensile load (mm)

 

1500

2000

2500

3000

3500

4000

Maximum lifting height at maximum pressure load (mm)

The head of the screw rod is not guided

250

385

500

400

490

850

820

Lead screw head guide

400

770

1000

800

980

1700

1640

Worm torque at full load(N.m)

P

18

39.5

119

179

240

366

464

M

8.86

19.8

60

90

122

217

253

efficiency(%)

P

22

23

20.5

 

19.5

16

18

M

11

11.5

13

 

12.8

9

11

Weight without stroke(kg)

 

7.3

16.2

25

 

36

70.5

87

Weight of screw rod per 100mm(kg)

 

0.45

0.82

1.67

 

2.15

4.15

5.20

Detailed Photos

 

 

 

SWL Series worm screw Jack:

1.The elevator is a combination of turbine pair and trapezoid screw rod to complete the lifting and lowering of objects. 2.Compact structure, light weight, safety and reliability, long service life, convenient installation

3.Self-locking function in the static state.

 

1. screw rod

2. nut bolt

3. cover

4.Skeleton oil seal

5.Bearing

6.Worm gear

7.Oil filling hole

8.Case

9.Skeleton oil seal

10.Cover

11. nut bolt

12.Bearing

13.Skeleton oil seal

14.Bearing

15.worm

16.Flat key

17.Bearing

18.Skeleton oil seal

19.Cover

20.Nut bolt

Product Description

 

Related Products

 

Packaging & Shipping

 

Company Profile

 

Standard or Nonstandard: Nonstandard
Application: Textile Machinery, Garment Machinery, Conveyer Equipment, Electric Cars, Motorcycle, Food Machinery, Marine, Mining Equipment, Agricultural Machinery, Car
Product Name: Swl Series Worm Gear Lift
Input Speed: 0-1440rpm
Ratio: 6-36
Applicable Industries: Hotels, Manufacturing Plant, Food & Beverage Facto
Samples:
US$ 50/Piece
1 Piece(Min.Order)

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helical gear

How do you prevent backlash and gear play in a helical gear mechanism?

In a helical gear mechanism, preventing backlash and gear play is crucial to ensure accurate motion control, minimize vibration, and maintain the overall efficiency of the system. Here’s a detailed explanation of how to prevent backlash and gear play in a helical gear mechanism:

  1. Proper Gear Pair Alignment: Ensuring proper alignment of the gear pairs is essential to minimize backlash and gear play. Precise alignment helps to achieve optimal contact between the helical gear teeth, reducing gaps and potential for play. Proper alignment can be achieved through accurate positioning of the gear shafts and the use of alignment tools, such as dial indicators or laser alignment systems.
  2. Preload or Axial Play Adjustment: Applying a preload to the helical gears can help eliminate backlash and gear play. Preload refers to the intentional application of a force that compresses the gear mesh, ensuring a tight fit between the gear teeth. This can be achieved by using adjustable bearings, shims, or axial play adjustment mechanisms to control the axial position of the gears. By applying an appropriate preload, the gear teeth are kept in constant contact, minimizing any play or backlash.
  3. Accurate Gear Tooth Profile: High-quality manufacturing and accurate tooth profile design are essential to minimize backlash and gear play. The tooth profile should be precisely calculated to ensure proper engagement and minimal clearance between the gear teeth. This includes considerations such as the helix angle, tooth thickness, and tooth contact pattern. By using well-designed gear teeth with tight tolerances, backlash and gear play can be significantly reduced.
  4. Proper Gear Mesh Lubrication: Adequate lubrication is critical to reduce friction, wear, and the potential for backlash in helical gears. The lubricant helps to create a thin film between the mating gear surfaces, ensuring smooth and consistent gear meshing. Proper lubrication also helps to dissipate heat generated during operation, preventing gear tooth damage. The selection of a suitable lubricant and regular maintenance of the lubrication system are essential to prevent backlash and ensure optimal gear performance.
  5. Stiff Gearbox Design: A stiff and rigid gearbox design can help minimize gear play and backlash. The gearbox housing and supporting structures should be designed to withstand the forces and loads generated during operation. This prevents any flexing or movement of the gear components, ensuring stable gear meshing and minimizing the potential for backlash. Stiffening measures can include using robust materials, adequate bracing, and reinforcing the gearbox housing.
  6. Regular Maintenance and Inspection: Regular maintenance and inspection of the helical gear mechanism are essential to prevent backlash and gear play. This includes checking for any signs of wear, misalignment, or damage in the gear teeth, bearings, and housing. Any worn or damaged components should be promptly replaced to maintain the integrity of the gear system. Regular lubrication and cleanliness of the gears also contribute to minimizing backlash and ensuring smooth operation.

By implementing these preventive measures, engineers can effectively minimize backlash and gear play in a helical gear mechanism. This results in improved precision, reduced vibration, and enhanced overall efficiency of the gear system.

helical gear

How do you calculate the efficiency of a helical gear?

The efficiency of a helical gear can be calculated by comparing the power input to the gear with the power output. The efficiency represents the ratio of the output power to the input power, expressed as a percentage. Here’s a detailed explanation of how to calculate the efficiency of a helical gear:

The formula for calculating gear efficiency is:

Efficiency = (Power Output / Power Input) * 100%

To calculate the efficiency, you need to determine the power input and power output values. Here are the steps involved:

  1. Power Input: The power input to the gear is the amount of power supplied to the gear system. It can be determined by multiplying the input torque (Tin) by the input rotational speed (Nin) in radians per second. The formula for power input is:

Power Input = Tin * Nin

  1. Power Output: The power output from the gear is the amount of power delivered by the gear system. It can be calculated by multiplying the output torque (Tout) by the output rotational speed (Nout) in radians per second. The formula for power output is:

Power Output = Tout * Nout

  1. Calculate Efficiency: Once you have determined the power input and power output values, you can calculate the gear efficiency using the formula mentioned earlier:

Efficiency = (Power Output / Power Input) * 100%

The resulting efficiency value will be a percentage, representing the proportion of input power that is effectively transmitted as output power by the helical gear system. A higher efficiency value indicates a more efficient gear system, with less power loss during the gear transmission.

It’s important to note that gear efficiency can be influenced by various factors, including gear design, tooth profile, operating conditions, lubrication, and manufacturing quality. Therefore, the calculated efficiency represents an estimate based on the given input and output power values, and it may vary in real-world applications.

helical gear

How do you choose the right size helical gear for your application?

Choosing the right size helical gear for your application involves considering several factors to ensure optimal performance and reliability. Here’s a detailed explanation of the steps involved in selecting the right size helical gear:

  1. Determine the Application Requirements: Start by understanding the specific requirements of your application. Consider factors such as the desired speed ratio, torque requirements, power transmission capacity, operating conditions (including temperature, lubrication, and environment), and any special considerations unique to your application.
  2. Calculate the Gear Parameters: Based on the application requirements, calculate the necessary gear parameters. These parameters include the pitch diameter, number of teeth, module or pitch, pressure angle, helix angle, face width, and center distance. These calculations can be performed using gear design formulas or software tools specifically designed for gear selection.
  3. Consider Load and Strength: Evaluate the load conditions that the helical gear will experience. Take into account factors such as the transmitted torque, radial loads, axial loads, and dynamic forces. Ensure that the selected gear can withstand the anticipated loads and provide sufficient strength and durability. Consider factors such as gear material, heat treatment, and tooth geometry to ensure adequate load-carrying capacity and resistance to wear and fatigue.
  4. Check Gear Meshing and Alignment: Proper gear meshing and alignment are crucial for smooth operation and efficient power transmission. Ensure that the selected gear size and tooth profile allow for proper meshing with the mating gear. Consider factors such as backlash, tooth contact pattern, and alignment tolerances to minimize noise, vibration, and wear. Proper alignment of shafts and bearings is also important for optimal gear performance.
  5. Consider Space Limitations: Evaluate the available space in your application for gear installation. Consider factors such as the gear diameter, length, and clearance requirements. Ensure that the selected gear size can fit within the available space without interfering with other components or causing installation challenges.
  6. Consult Manufacturer’s Guidelines: Refer to the manufacturer’s guidelines, catalogs, and technical documentation for the specific type and brand of helical gear you are considering. Manufacturers often provide recommendations, selection charts, and engineering support to assist in choosing the right size gear for different applications. It’s beneficial to leverage their expertise and knowledge.
  7. Consider Cost and Availability: Evaluate the cost and availability of the selected helical gear. Consider factors such as the gear’s price, lead time, availability of spare parts, and any additional costs associated with installation or maintenance. Balance your requirements with the available budget and ensure that the chosen gear offers a cost-effective solution without compromising performance or quality.

By following these steps and considering the application requirements, load conditions, gear parameters, meshing characteristics, space limitations, manufacturer’s guidelines, and cost factors, you can choose the right size helical gear that meets your specific application needs.

It’s important to note that gear selection can be a complex process, and it may be beneficial to consult with an experienced engineer or gear specialist to ensure an accurate and optimized gear sizing for your specific application.

China Standard Swl Series Helical Cast Iron Mechanical Manual Worm Gear Hydraulic Screw Jack supplier China Standard Swl Series Helical Cast Iron Mechanical Manual Worm Gear Hydraulic Screw Jack supplier
editor by CX 2023-10-23